"What embitters the world"

“WHAT embitters the world is not excess of criticism, but the absence of self-criticism. It is comparatively of little consequence that you occasionally break out and abuse other people, so long as you do not absolve yourself. The former is a natural collapse of human weakness; the latter is a blasphemous assumption of divine power.”

~G.K. Chesterton: On Bright Old Things — and Other Things in “Sidelights on New London and Newer New York: And Other Essays.” (1932)