Lao Tzu - He who knows others is wise. He who knows himself is enlightened.
William Faulkner - Don't bother just to be better than your contemporaries or predecessors. Try to be better than yourself.
Tao Te Ching - Knowing others is intelligence; knowing yourself is true wisdom. Mastering others is strength; mastering yourself is true power.
Richard Bach - We wait all these years to find someone who understands us, I thought, someone who accepts us as we are, someone with a wizard's power to melt stone to sunlight, who can bring us happiness in spite of trials, who can face our dragons in the night, who can transform us into the soul we choose to be. Just yesterday I found that magical Someone is the face we see in the mirror: It's us and our homemade masks.