In Genesis 4:7, God instructs Cain concerning the rules of his household. After God rejected the work of Cain’s hands as an offering, Cain was very angry. In response, God lays out the rule by which Cain is expected to govern his life.

And if you do good, will you not be accepted? And if you do not do good, sin lies at the opening, and its desire is unto you, and you are to rule over it – Genesis 4:7.

This is the first time in Scripture we are introduced to the sin nature. The sin nature describes the human nature bent by Adam’s fall. Through Adam’s trespass and sin, his nature became bent towards doing what is wrong, for although Eve was thoroughly deceived, Adam was not, 1 Timothy 2:14. Adam passed on this bent nature to his offspring, Genesis 5:3. Therefore, even though as humans we now inherently possess the knowledge of good and evil, we are all born with a nature that is separated from God in our spirit and bent towards wrong. However, with this knowledge, we are also to rule over our nature, not permit it to rule over us.

After Cain does not heed God’s instructions and slayed his brother as a sacrifice, he was punished. The works of his hand will no longer produce good, and he is to wander the earth, never possessing a homeland to reside in. In Cain’s response, we again encounter the sin nature when he states, “My perversity is greater than I can bear.”

And Cain said to the LORD, “My perversity is greater than I can bear.” Genesis 4:13.

In Genesis 4:7, the word for sin is in a specific […]