Knowing others is wisdom;
Knowing the self is enlightenment.
Mastering others requires force;
Mastering the self needs strength.
He who knows he has enough is rich.
Perseverance is a sign of willpower.
He who stays where he is endures.
To die but not to perish is to be eternally present.
Reference: Lao Tzu Tao Te Ching XXXIII ( Trans. Feng & English )