Related:

• The fool doth think he is wise, but the wise man knows himself to be a fool.
  -- William Shakespeare (1564-1616), As You Like It -- Act v, Sc. 1...
• He is winding the watch of his wit; by and by it will strike. -- William Shakespeare
• Willst thou show the wealth of thy wit in an instant? -- William Shakespeare
• If A fool persists in his folly he shall become wise. -- William Blake
• Thus we play the fools with the time, and the spirits of the wise sit in the clouds and mock us.
  -- William Shakespeare (1564-1616), King Henry IV -- Act ii, Sc. 2...
• I do know of these That therefore only are reputed wise For saying nothing.
  -- William Shakespeare (1564-1616), The Merchant of Venice -- Act i, Sc. 1...
• So wise so young, they say, do never live long. -- William Shakespeare (1564-1616), King Richard III -- Act iii, Sc.
  1...
• Although a wise man might urge that one should suffer fools gladly, this should not be construed as license for any fool to demand that one do so.
  -- Frederic William Kanto...
• It is a great misfortune neither to have enough wit to talk well nor enough judgement to be silent.
  -- Jean de La Bruyere...