Tao Te Ching · Chapter 45

大成若缺，其用不弊。
大盈若沖，其用不窮。
大直若屈，其用不居。
大巧若拙，其用不輟。
大辯若訥，其用不差。
躁勝寒，靜勝熱。清靜為天下正。

Who 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.

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