In Parashat Toledot, we are given the following devastating insight into a wounded psyche:
"Now Esau harboured a grudge against Jacob because of the blessing which his father had
given him, and Esau said to himself, “Let but the mourning period of my father come,
and I will kill my brother Jacob” (Gen. 27:41).

Rashi comments on this passage as follows:
“Let but the mourning period of my father come . . . ” We should understand
this in its plain sense, that is, so as to not cause his father grief. Even though
there are various homiletic explanations."