What is Sin?

While this might seem like a complicated question, there’s a simple way to look at it. Sin is a failure to love God and love others. Sin is the opposite of love.

This is why the Bible describes sin as “lawlessness” ( ESV), or “transgression of the law” of God (KJV).

The “law” we’re talking about here is what Jesus Himself called the two greatest commandments: love God, and love your neighbor as yourself (Matthew 22:36-40).

It is selfishness, then, that breaks the law of God. And it’s something every single human being struggles with.

But all is not lost. God is “merciful and gracious, longsuffering and abounding in goodness and truth…forgiving iniquity and transgression and sin” (Exodus 34:6, Exodus 34:8, NKJV). Because of the free gift of forgiveness we’re offered through Jesus Christ, He will always help us if we look to Him.

God’s desire for us is never condemnation; it is always forgiveness.

But what does this mean for us day by day? How do we know if we’re “sinning”? What do we do if we’re struggling with a bad habit?

Even when we feel like we know right from wrong, some of the choices life offers us can throw us for a loop. So let’s break this down into the basics. We’ll look at:

What is the origin of sin?

Hand plucking apple as we discuss origin of sin and how satan deceived Eve in eating the forbidden fruit in Garden of Eden.Sin on Earth began in the Garden of Eden, when Adam and Eve took it upon themselves to try and be like God (Genesis 3). But sin actually originated in Heaven among the angels. It started as just a thought in the mind of Lucifer, who used to be an angel of high position, but he is now referred to as the Devil, or Satan (1 John 3:8).

Lucifer coveted Jesus’ position in Heaven (Isaiah 14:12-15). He wanted to be worshiped over God. When he could not become like God, he caused rebellion in Heaven and convinced ⅓ of the angels that God could not be trusted (Ezekiel 28; Revelation 12).

God could not let sin exist in Heaven, so Satan was cast out, along with the angels that he deceived (Revelation 12).

Fast forward to the Garden of Eden.

God created Adam and Eve in His image—to be perfect and without sin. He gave them all they could ever want, but He gave them specific instructions:

“And the Lord God commanded the man, saying, ‘Of every tree of the garden you may freely eat; but of the tree of the knowledge of good and evil you shall not eat, for in the day that you eat of it you shall surely die’” (Genesis 2:16-17, NKJV).

However, when Satan in the form of a serpent tempted Eve at the tree of knowledge of good and evil, he tempted her to commit the same sin that he committed in heaven—to know what God knows and be as powerful as He is:

“Then the serpent said to the woman, ‘You will not surely die. For God knows that in the day you eat of it your eyes will be opened, and you will be like God, knowing good and evil’” (Genesis 3:4-5, NKJV).

Ultimately, Adam and Eve made the decision to distrust God and uphold their own desires, choosing selfishness over loving God.

They doubted God’s guidance that He had their best interest at heart and chose to outrightly disregard God by following their own desires. They chose to be wise in their own eyes; they followed the serpent’s promise that God was withholding something “good” from them instead of following the wisdom of God.

What were the natural consequences of this original sin?

Distance from God of many kinds: emotional, spiritual, and physical distance, as Adam and Eve had to leave the Garden and couldn’t commune with God face-to-face anymore.

It also resulted in multiplied distance and distrust in human relationships as well. After sin, Adam and Eve were ashamed of their nakedness and felt embarrassment and guilt. Furthermore, Adam blamed Eve in order to avoid shame.

So, sin ruptures both our relationship with God and our relationships with each other. It twists the two greatest commandments—love God and love others as you love yourself—into lies:

  • God is to be feared and cannot be trusted
  • Uphold yourself over others in order to avoid guilt and shame

What can we learn from this original sin about the nature of sin in general?

In other words, how does this Bible story show us what makes something a sin and what its effects are?

Let’s find out.

What makes something a sin and what are the effects of sin?

What makes something a sin depends on the person’s motive and the state of that person’s heart. One must consider whether the heart is in sync with the two greatest commandments.

We can determine this using Jesus’ Sermon on the Mount from Matthew 5, as an example.

Here, Jesus cites two of the 10 Commandments, “You shall not murder” and “You shall not commit adultery,” but He makes it clear that the action is not what constitutes the sin. Rather, Jesus says:

“Whoever is angry with his brother without a cause shall be in danger of the judgment” (Matthew 5:22, NKJV).


“I say to you that whoever looks at a woman to lust for her has already committed adultery with her in his heart” (Matthew 5:28, NKJV).

Murder is the result of hate in the heart.

Adultery is the result of lust in the heart.

The state of the heart is what initiates the sin.

So, we have to ask ourselves, honestly, at the core of this action, thought, word, etc., am I failing to love God and love others?

Number 10 on Rock as we study how the Ten Commandments of God are instructions on how to love God and love others.Even the 10 Commandments that God gave to the children of Israel in Exodus 20, when boiled down, are instructions for loving God and loving others.

These two greatest commandments and the principles that highlight them, the 10 Commandments, can guide us to find what makes something a sin rather than looking for an unambiguous and exhaustive list that says, “this is a sin” and “this isn’t a sin.”

What it comes down to is that identifying sin in our lives is much more about looking at the state of our hearts than looking through a set of rules.


Because each of our individual situations is different.

While the 10 Commandments are essential biblical principles we use to govern our lives, the moment we determine that we can leave our hearts unchecked because simply following the rules is “enough” is the moment we forget the purpose of the Law: to teach us how to love God and how to love others.

This love requires the examination of one’s heart.

But wouldn’t it be easier if we had a complete list of sins to avoid that detailed every situation possible?

Probably. Then we could just check the list every day and that would be that.

But then our whole faith would be based on the avoidance of specific actions. No relationship, no personal growth, no critical thinking or empathy needed.

That’s not a life of love in Christ. Simply following rules without examining the heart doesn’t lead to spiritual maturity.

More than anything, God wants us to have a relationship with Him in which we choose to love Him. That’s what makes it real.

We choose to examine our hearts and find what harms others or hurts God or inappropriately upholds self over others.

Let’s flashback to the Garden of Eden.

The sin wasn’t about eating a random fruit. It wasn’t even about listening to the serpent.

Humankind’s original sin was about choosing to place self over God.

When Adam and Eve chose to decide what was right or wrong on their own terms and ignored God’s direction, when they chose to love themselves over God and distrust Him, that’s when they sinned. And that’s when they felt they needed to distance themselves from God by hiding (Genesis 3:10).

Same for us today. When we distance ourselves from God, we continue to hurt ourselves, others, and God since He longs to be in a close relationship with us.

This leads us to our next question…

What is the ultimate result of sin?

Cross near a mountain as we study how Jesus bore the wages of our sins on the Cross of Calvary and offers us Eternal life.The Bible is clear in Romans 6:23 what the effects of sin are in the grand scheme of human existence: “For the wages of sin is death” (NKJV)

This doesn’t mean that right when we sin we die—think of Adam and Eve in the Garden, they were told they would die, but rather than dying immediately, what God meant was that the process of death would begin. It also doesn’t mean that God punishes us for sinning with death.

In this verse, Paul is saying that without Jesus’ salvation, the consequence of sin is eternal death. But the remedy is expressed in the next section of that same verse. It says that “the gift of God is eternal life.”

Without God, humanity would face the natural consequences of sinning: pain, suffering, and eternal death. Without the forgiveness of God, sin would impact our lives here on earth and for eternity. That’s what forever looks like when sin rules instead of love.

Eternal death is the ultimate effect of sin in the grand scheme of humanity (Revelation 20:14), but what is the effect of sin on the individual? What happens to our hearts when we sin?

What happens when we sin?

Whenever we sin, the effect of that is separation from God.

The prophet, Isaiah, says this: “Your iniquities have separated you from your God” (Isaiah 59:2, NKJV).

This doesn’t mean that God wants to be separated from us. In fact, it’s just the opposite. God longs to be near us and in a relationship with His children. Rather, sin separates us from God in both a metaphorical and physical sense because it becomes more difficult to love God and others—emotional and spiritual distance—and because, ultimately, the choice to cherish self over God will lead to eternal physical separation from God.

Two men hugging together as they reconcile in their friendship by apologizing and forgiving each other through Holy Spirit.Imagine if you wronged a friend, and then, without apologizing, continued to wrong the friend again and again. Wouldn’t the natural result be more distance between the two of you, and eventually, a falling out?

Distance without reconciliation often results in more distance, and the increasing rupture of that relationship makes it easier and easier to act in ways that hurt both ourselves and our friend. This is a helpful example when considering what sin does to our hearts.

In the end, the more we sin without repentance, the further the distance we drive between ourselves and God, which eventually leads to the unpardonable sin (we’ll talk about this in the next section).

As a general guideline, things that separate us from God are things that break the two greatest commandments that Jesus shares: to love God and your neighbor as yourself. Again, a good place to start to see how this kind of relational rupture happens is with the 10 Commandments.

Commandments 1-4 give us principles we can follow to love God.

Principles 1-4
1. Have no other gods
2. Do not worship any idols
3. Use the name of God only with respect
4. Keep the Sabbath day holy

Commandments 5-10 give us principles we can follow to love others.

Principles 5-10
5. Honor your father and mother
6. Do not murder
7. Do not commit adultery
8. Do not steal
9. Do not bear false witness
10. Do not covet your neighbor’s belongings

When we fail to love God and others, it will be more difficult for us to know what is right and wrong, according to God. We do what is right in our own eyes and deceive ourselves into thinking bad decisions are good ones.

We act in our benefit at the expense of others.

This doesn’t mean that you need to loathe yourself. To look at yourself and say, “I am worthless,” or “I am undeserving of love” is also to say that God’s creation is worthless and undeserving of love. Being selfless is not the same as self-loathing. In fact, self-indulgence and self-loathing are both forms of selfishness, and to loathe yourself would be a sin of mistrust in God—again prioritizing a human definition of right and wrong versus a God-ordained definition. God created us in His image.

The key to not deceiving ourselves into thinking that we know what is best is to listen to the calling of the Holy Spirit on our conscience.

The Holy Spirit guides us away from sin and reminds us that God is the source of wisdom (James 1:5).

Specifically, the Bible tells us that the Holy Spirit can convict us of sin and lead us to truth (John 16:8,13).

But how do you know if the Holy Spirit is calling you to truth and it’s not just some random impression?

In this case, familiarizing yourself with the Word of God and testing the tug on your conscience with Biblical principles can be helpful.

The Holy Spirit is also important for understanding what the unpardonable sin is and how to avoid it. Maybe you’ve heard about it before and have questions. Hopefully, the next section can provide some answers.

What is the unpardonable sin?

Dove flying as we learn more about blasphemy or sin against the Holy Spirit, which is also known as unpardonable sin.The unpardonable sin is what happens when we reject the Holy Spirit so many times that we no longer sense His calling on our conscience.

You may ask, why is it called “unpardonable?”

Well, the unpardonable sin is when God has no other means to reach a heart. The person has rejected God so much—expressed repeated defiance towards Him—that is no way for the heart to receive pardon. Hence, “unpardonable.”

The idea of the unpardonable sin comes from one of Jesus’ teachings in Matthew:

“Therefore I say to you, any sin and blasphemy shall be forgiven men, but blasphemy against the Spirit shall not be forgiven” (Matthew 12:31, NKJV).

So how does one blaspheme against the Holy Spirit?

Time after time of ignoring and rejecting God makes the tug of the Holy Spirit on our conscience duller and duller. At the point of the unpardonable sin, we have chosen a life that will only ever reject God. Ultimately, we chose to be “wise in our own eyes” and ignore God’s instruction (Isaiah 5:21, NKJV). We have chosen selfishness over selfless love of God and others.

It’s important to keep in mind, though, that the unpardonable sin isn’t something that happens accidentally.

And if you’re worrying that you have committed the unpardonable sin, chances are, you haven’t. This is because you are sensing your need for salvation. That is the Holy Spirit there, still being heard and felt in the conscience.

The point is, it’s a process that takes time and persistent rejection of God’s offer of mercy and pardon. A process of repeatedly failing to listen to the call to love God and others to the point of rejecting the Holy Spirit. This process is intentional.

Thankfully, until that point, we have a merciful and gracious God who abundantly forgives.

The hope of forgiveness

Man looking up to the cross as we learn how the death of Jesus deliver us not only from penalty of sin but also power of sin.

To sinners, which includes all of us, the story of Jesus is the best news ever.

When Jesus was on this Earth, He didn’t fail to love God, and He certainly didn’t fail to love others.

The Bible is so clear that God’s plan of salvation was made so that we could be saved from our sin, and Jesus’ death on the cross is that redemption in action. In fact, the Bible tells us that because Jesus died for us, “we should no longer be slaves of sin” (Romans 6:6, NKJV).

These are just a few verses that remind us that God is merciful, abundant, and forgiving, even before we ask:

“There is therefore now no condemnation for those who are in Christ Jesus, who do not walk according to the flesh, but according to the Spirit. For the law of the Spirit of life in Christ Jesus has made me free from the law of sin and death” (Romans 8:1-2, NKJV).

“Where sin abounded, grace abounded much more, so that as sin reigned in death, even so grace might reign through righteousness to eternal life through Jesus Christ our Lord” (Romans 5:20-21, NKJV).

“Come now, let us reason together, says the Lord: though your sins are like scarlet, they shall be as white as snow; though they are red like crimson, they shall become like wool” (Isaiah 1:18, NKJV).

“He has delivered us from the power of darkness and translated us into the kingdom of the Son of His love, in whom we have redemption, through His blood the forgiveness of sins” (Colossians 1:13-14, NKJV).

“And you He made alive, who were dead in trespasses and sins…But God, who is rich in mercy because of great love with which He loved us…made us alive together with Christ (by grace you have been saved)” (Ephesians 2:1,4-5, NKJV).

At the end of the day, it’s such a blessing that we can fully trust in God. He knows our hearts.

Jesus’ salvation gives us hope for an abundant life full of love for Him and love for others. Let’s live out that love and remember that God is always desiring us to draw nearer to Him.

If you want to know more about drawing closer to God and living like His people in this walk, check out our Bible Studies page!

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