Because one believes in oneself, one doesn't try to convince. Because one is content with oneself, one doesn't need others' approval. Because one accepts oneself, the whole world accepts him or her.
LaoziThe Eternal generates the One. The One generates the Two. The Two generates the Three. The Three generates all things.
LaoziDo nondoing, strive for nonstriving, savor the flavorless, regard the small as important, make much of little, repay enmity with virtue; plan for difficulty when it is still easy, do the great while it is still small. The most difficult things in the world must be done while they are easy; the greatest things in the world must be done while they are small.
LaoziA man's excellence is like that of water; It benefits all things without striving; It takes to the low places shunned by men. Water is akin to Tao. . . . In all the earth nothing weaker than water, Yet in attacking the hard, nothing superior, Nothing so certain in wearing down strength: There is no way to resist it. Note then: The weak conquer the strong, The yielding outlast the aggressors.
Laozi