Vengeance is mine! I will repay, says who?

[W]e also receive a glimpse of the persistent disorder personified in the boast of Lamech (Gen 4:23-24). Here we find a warped perspective on the vengeance God offered in protection of Cain. With Lamech it is reflected as a right to his own vengeance as he builds order around himself. So even as order progresses, disorder also becomes entrenched and is rationalized with self-justification.—Lost World of the Flood, 116