Know thyself? If I knew myself I would run away.

The ancient precept, “Know thyself,” and the modern precept, “Study nature,” become at last one maxim.

One has to know the size of one's stomach.

No one is free who has not obtained the empire of himself. No man is free who cannot command himself.

Self-awareness is not self-centeredness, and spirituality is not narcissism. 'Know thyself' is not a narcissistic pursuit.

He who knows others is wise; he who knows himself is enlightened.