A son who does not understand his parents’ hearts?

Esau, who had already married two Hittite women (Genesis 26:34),

knew that his father Isaac had blessed Jacob and sent him to Mesopotamia

and commanded him not to marry a Canaanite woman,

and that Jacob obeyed his parents' command.

So, Esau went to Ishmael, Abraham’s son,

and married Mahalath, the daughter of Ishmael and sister of Nebaioth,

in addition to his existing wives (28:6-9).

From these words, we can see that Esau learned four things:

(1) Father Isaac blessed his younger brother Jacob and sent him to Mesopotamia;

(2) Father Isaac commanded Jacob not to marry a Canaanite woman;

(3) Jacob obeyed his parents' command and went to Mesopotamia;

(4) His father Isaac did not like Canaanite women.

But strangely enough, it seems there was one thing Esau didn't know.

That one thing was that his two wives brought grief to his parents (26:35),

especially his mother Rebekah who said to her husband Isaac,

“I am tired of living because of the daughters of Heth” that is, his two wives (27:46).

To put it in modern terms,

it seems that the oldest son was unaware of the conflict between his mother and his wife.

Another thing that Esau did not know was

that her mother Rebekah had let her younger brother Jacob

take away the blessing of his father Isaac that he was entitled to (vv. 1-36).

In other words, it seems that Esau did not know that Jacob's mastermind was his mother Rebekah.

I think Esau didn't really understand his parents' hearts,

especially his mother's heart.

Esau seems to have been ignorant of how his choice

to marry foreign women had bring grief to his parents

and made the life of his mother Rebekah especially miserable.

In this way, I think the term “Being childless is having good fortune” can be applied

to a child who cannot understand his parents' heart at all.