Here’s a neat thought. There are three falls in the first six chapters of Genesis: Adam, Cain, and the sons of God (whoever you think they are). Adam’s sin is against God – he has no patience. Cain’s sin is against his brother – he kills him. The sons of God sin by taking women that they shouldn’t. In the latter half of Genesis, these three falls are symbolically reversed. Abraham has patience, for decades. Jacob does not kill his brother, and runs away rather than allow his brother to kill him. Joseph refuses to lie with Potiphar’s wife.

I got all this from Dr. Leithart. Of course. But that makes it no less neat.