“Life with another person is always difficult.”

Source: South of the Border, West of the Sun

Source: The Devotion of Suspect X

Sketchbook 1946-1949

On his role in The Fisher King (1991), as quoted in "Dreams: The Fisher King" (2006) edited by Phil Stubbs http://www.smart.co.uk/dreams/fkprod1.htm
Context: Parry is a man with a previous life that was so damaged that he had to create another personality. … It's like post-traumatic stress syndrome: Some people respond to traumatic or tragic events by withdrawal; some even create other personalities. Parry is a creation — somewhat Don Quixote, somewhat Groucho Marx — but he's a creation designed to avoid a past event.

Source: Caddie Woodlawn

Book Sometimes you win Sometimes you Learn

Variant: It is one of the beautiful compensations of life that no man can sincerely try to help another without helping himself.