The Bad Example of Cain
Cain’s underlying sin was his arrogant insistence that he could come to God on his own terms. This is the “way of Cain” of which Jude speaks—self-sufficiency, insisting on coming to God on one’s own terms, murderous jealousy of those who truly seek God and are accepted by him, and “repentance” only of the consequences of these sins and not of the sins themselves. It all starts with an attitude of self-sufficiency.