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• To thine own self be true. (If not that, at least make some money.)
• This above all: to thine own self be true. -- Polonius in _Hamlet_ by William Shakespeare
• Let another man praise thee, and not thine own mouth
  a stranger, and not thine own lips. -- Proverbs XXVII, 2...
• Neither a borrower nor a lender be; For loan oft loses both itself and friend, And borrowing dulls the edge of husbandry.
  This above all: to thine own self be true, And it must follow, as the night the day, Thou canst not then be false to any man....
• No man is an Island, entire of it self; every man is a piece of the Continent, a part of the mai
  if a clod be washed away by the sea, Europe is the less, as well as if a promontory were, as well as if a manor of thy friends or of thine own were...
• Help thy brother's boat across, and lo! Thine own has reached the shore. -- Old Hindu Proverb
• Out of thine own mouth will I judge thee. -- New Testament -- Luke xix, 22
• Be noble! and the nobleness that lies In other men, sleeping but never dead, Will rise in majesty to meet thine own.
  -- James Russell Lowell (1819-1891) -- Sonnet iv...
• Thriftless ambition, that wilt ravin up Thine own life's means!
  -- William Shakespeare (1564-1616), Macbeth -- Act ii, Sc. 4...