Taoism
Tao Te Ching, Chapter 43
Text
1
The softest thing in the world dashes against and overcomes the hardest; that which has no (substantial) existence enters where there is no crevice. I know hereby what advantage belongs to doing nothing (with a purpose).
2
There are few in the world who attain to the teaching without words, and the advantage arising from non-action.
Translation: James Legge, The Tao Teh King (Sacred Books of the East, 1891), public domain.