Related:

• Most powerful is he who has himself in his own power. -- Seneca
• Man is least himself when he talks in his own person.
  Give him a mask and he will tell the truth. Oscar Wilde...
• He that would make his own liberty secure must guard even his enemy from oppressio
  for if he violates this duty, he establishes a precedent that will reach unto himself....
• He doth nothing but talk of his horse; and he makes it a great appropriation to his own good parts, that he can shoe himself.
  -- William Shakespeare (1564-1616), The Merchant of Venice -- Act i, Sc. 2...
• He that would make his own liberty secure must guard even his enemy from oppressio
  for if he violates this duty he establishes a precedent that will reach to himself....
• He that uses many words for the explaining any subject, doth like the cuttlefish, hide himself for the most part in his own ink.
  -- Ray...
• He is a legend in his own mind.
• To date, there is only one animal in the Galaxy dangerous to man- man himself.
  He must supply his own indispensable competition. He has no enemy to help him. -- Lazarus Long...
• The most difficult secret for a man to keep is his own opinion of himself. PAGNOL