Hebrews 3:13 says, “But exhort one another daily…lest any of you be hardened through the deceitfulness of sin.” Calloused hearts have hidden sin. Romans 5:12 says that through Adam sin entered the world. Adam and Eve bore Cain and Abel.

Cain’s sacrifice was not accepted, though Abel’s was. Genesis 4:5 says, “…Cain was very angry, and his countenance fell.” In verse 7 God asked Cain a question. It says, “If you do well, will you not be accepted?…”

Cain’s sin remained hidden. His anger smoldered until in rage he killed his brother. He did not do what God had said. Verse 7 continued, “…sin lies at the door. And its desire is for you, but you should rule over it.”

Hidden sin is the trap-stick in satan’s trap. Hidden lust, bitterness, resentment, critical spirit, unforgiveness, etc. Numbers 32:23 says, “…you have sinned against the Lord; and be sure your sin will find you out.”