Baldur is pissed off that his father Odin blasted his psychologist with a lightning bolt.

Odin explains that humans should know better than to psychoanalyze the gods. There is a difference between knowledge and wisdom… instead of taking advice from theory-schooled windbags, take some his battle-tested father. “Whatever doesn’t kill us makes us stronger.”

Or, in the case of Mr. Freud, “Whatever kills you also makes you dead.”