What was Cain's major problem according to Les?
Cain's major problem was rationalizing from the human side. He assumed God would accept what he grew by his own labor rather than requiring an animal from Abel. He reasoned that God surely would accept him on his own terms, substituting human reasoning and self-effort for God's prescribed way.
Les explains that Cain’s major problem was that he rationalized from the human side. Cain said God surely would not expect him to beg, borrow, or barter for an animal from his brother Abel. He brought what he had grown by the sweat of his brow, assuming God would accept him. Les ties this to the false teachers in Jude, whose thinking is merely rationalization from the human side—it sounds good but is not God’s truth.