道德经 45

1Who thinks his great achievements poor Shall find his vigour long endure. Of greatest fulness, deemed a void, Exhaustion ne'er shall stem the tide. Do thou what's straight still crooked deem; Thy greatest art still stupid seem, And eloquence a stammering scream.

2Constant action overcomes cold; being still overcomes heat. Purity and stillness give the correct law to all under heaven.