Related:

• He that thinks himself the wisest is generally the least so. C.C. Colto
• There is this difference between happiness and wisdom
  he that thinks himself the happiest man really is so...
• The greatest of fools is he who imposes on himself, and in greatest concern thinks certainly he knows that which he has least studied, and of which he is profoundly ignorant.
  -- Shaftesbury...
• The man who says what he thinks is finished, and the man who thinks what he says is an idiot.
• He [Moliere] pleases all the world, but cannot please himself.
  -- Nicholas Boileau-Despreaux (1636-1711) -- Satire 2...
• So much is a man worth as he esteems himself.
• It is not the critic who counts; not the man who points out how the strong man stumbled or where the doer of deeds could have done them better.
  The credit belongs to he man who is actually in the arena...
• Intellect annuls fate. So far as man thinks he is free. -- Emerso
• A politician is a man who stands for what he thinks the voters will fall for.