However Cain, in his pride, refused to admit his transgression before God. Instead, he became angry and despondent. He questioned him because He did not want Cain to perish. God wanted Cain to repent of his sins, and follow the right way. God was warning Cain about a terrible enemy, which threatened to destroy him and his descendants.
Sin is the problem of the world .
It is our worst enemy. Sin is like a snake, full of deadly poison. It is like a little spark that can burn up a great forest. Sin is lawlessness . He who does what is sinful is of the devil, because the devil has been sinning from the beginning.