As far as you can, get into the habit of asking yourself in relation to any action taken by another: "What is his point of reference here?" But begin with yourself: examine yourself first.
Marcus AureliusMost of what we say and do is not essential. If you can eliminate it, you'll have more time, and more tranquillity. Ask yourself at every moment, 'Is this necessary?'
Marcus AureliusBe not disgusted, nor discouraged, nor dissatisfied, if thou dost not succeed in doing everything according to right principles; but when thou bast failed, return back again, and be content if the greater part of what thou doest is consistent with man's nature, and love this to which thou returnest
Marcus Aurelius