How did Esau's lack of faith affect his behavior?
Esau’s lack of faith made him a man destitute of faith, and that condition affected his behavior. Isaac feared what Esau might do, believing Esau was capable of hurting him. The account illustrates that when faith is absent, people lose a sense of right and wrong, not comprehending violence or immorality.
Les explains that Esau was a man destitute of faith, and when people are destitute of faith, it affects their behavior. When Esau came in and Isaac realized what had happened, Isaac trembled, and Les suggests Isaac was scared to death of what Esau might do. Les thinks Esau was the kind of man Isaac realized was very capable of hurting old Isaac. Les also connects this to a broader observation: a lady working with pregnant teenage girls said these teenagers have no sense of right and wrong; no one is teaching them, and they do not comprehend that violence is wrong or that immorality exists. Faith changes that.