Related:

• The surest way to corrupt a youth is to instruct him to hold in higher esteem those who think alike than those who think differently.
  -- Nietzsche...
• People must not attempt to impose their own 'truth' on others.
  The right to profess the truth must always be upheld, but not in a way that involves contempt for those who may think differently....
• Those who won't think will have it done for them.
• For those of you who think life is a joke, just think of the punchline.
• Those of you who think you know everything are annoying those of us who do.
• This world is a comedy to those who think, a tragedy to those who feel. -- Horace Walpole
• Those of you who think you know everything are very annoying to those of us who do.