If a man proves too clearly and convincingly to himself. . . that a tiger is an optical illusion--well, he will find out he is wrong. The tiger will himself intervene in the discussion, in a manner which will be in every sense conclusive.
Working as a teaboy may have helped my confidence, but not everyone else was so pleased. I could never remember who had milk or how many sugars, and I had an unusual talent for spilling tea on the recording console.