Related:

• Out of thine own mouth will I judge thee. -- New Testament -- Luke xix, 22
• To thine own self be cool.
• Invite the man that loves thee to a feast, but let alone thine enemy.
  -- Hesiod (c. 700 BC) -- Works and Days, Line 342...
• 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
• FOLLY, n. That "gift and faculty divine" whose creative and controlling energy inspires Man's mind, guides his actions and adorns his life.
  Folly! although Erasmus praised thee once In a thick volume, and all authors known, If not thy glory yet thy power have shown, Deign to take homage from thy son who hunts Through all thy maze his brothers, fool and dunce, To mend their lives and to sustain his own, However feebly be his arrows thrown, Howe'er each hide the flying weapons blunts....
• 'Tis better that a man's own works, than that another man's words should praise him. -- L'Estrange
• 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...
• It is better to do thine own duty, however lacking in merit, than to do that of another, even though efficiently.
  It is better to die doing one's own duty, for to do the duty of another is fraught with danger....