Lao Tsu

Under heaven all can see beauty as beauty only because there is ugliness. All can know good as good only because there is evil

-Tao Te Ching - Two

Those who know do not talk
Those who talk do not know

-Tao Te Ching- Fifty-Six

That which shrinks
Must first expand.
That which fails
Must first be strong
That which is cast down
Must first be raised.
Before receiving
There must be giving.

This is called the perception of the nature of things.
Soft and weak over come hard and strong.

-Tao Te Ching- Thirty-Six