Kommentar zu Bereschit 6:6

וינחם ה' כי עשה AND THE LORD REPENTED THAT HE HAD MADE — (The first word is connected with that which means “comfort”) It was a consolation to Him that He had created man on earth, for had he been one of the heavenly beings he would have incited them also to rebel against God (Genesis Rabbah 27:4).

AND THE ETERNAL REPENTED… AND IT GRIEVED HIM AT HIS HEART. The Torah speaks in the language of men. The purport is that they rebelled, and grieved His holy spirit⁵¹⁴Isaiah 63:10. with their sins. The sense of the expression at His heart is that He did not tell this to a prophet, a messenger of G-d. This expression is also found with respect to thinking, just as: to speak to my heart,⁵¹⁵Genesis 24:45. and other similar expressions.
In Bereshith Rabbah⁵¹⁶27:6. there is a significant matter concerning this, expressed by a parable which the Rabbis bring of an agent and an architect.⁵¹⁷Rabbi Berachyah said: “It is like a king who had a palace built by an architect, and when he saw it, it displeased him. Against whom is he to complain? Surely against the architect.” Rabbi Assi said: “It is like one who traded through an agent and suffered a loss. Whom does he blame? The agent. Here too It grieved Him at His heart.” This constitutes a great secret which is not permitted to be written down. The one who knows it will understand why here the Tetragrammaton is written while in the whole of the rest of the chapter and the account of the flood, the name Elokim is used.

ויתעצב אל לבו, seeing that G’d does not want even the guilty to die instead of finding their way back. The opposite “emotion” of G’d to the one expressed here is found in Psalms 104,31 ישמח ה' במעשיו, “the Lord ‘enjoys’ the deeds of His creatures.”