Lao Tzu

Stop thinking, and end your problems.
Lao Tzu - Tao Te Ching
Heaven endures and the earth last a long time because they do not live for themselves.

Know the masculine, keep to the feminine.
Lao Tzu - Tao Te Ching
To conquer others is to have power, to conquer yourself is to know the way.

- Lao Tzu