Related:

• Love all, trust a few. Do wrong to none. -- William Shakespeare
• This above all: to thine own self be true. -- Polonius in _Hamlet_ by William Shakespeare
• Give every man thine ear, but few thy voice.
  -- William Shakespeare, (The only good part of Polonius' advice to Laertes)...
• Had I a dozen sons, each in my love alike and none less dear than thine and my good Marcius, I had rather eleven die nobly for their country than one voluptuously surfeit out of action.
  -- William Shakespeare (1564-1616), Coriolanus -- Act i, Sc. 3...
• Thyself and thy belongings Are not thine own so proper as to waste Thyself upon thy virtues, they on thee.
  Heaven doth with us as we with torches do, Not light them for themselve...
• Thriftless ambition, that wilt ravin up Thine own life's means!
  -- William Shakespeare (1564-1616), Macbeth -- Act ii, Sc. 4...
• 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....
• Ye have heard that it have been said, Thou shalt love thy neighbour, and hate thine enemy.
  -- New Testament -- Matthew v, 43...
• Look with thine ears. -- Shakespeare