One might equate growing up with a mistrust of words. A mature person trusts his eyes more than his ears. Irrationality often manifests itself in upholding the word against the evidence of the eyes. Children, savages and true believers remember far less what they have seen than what they have heard.
Between the Devil and the Dragon: The Best Essays and Aphorisms of Eric Hoffer (ed. HarperCollins Publishers, 1982)