柔，坚。Softest, Toughest.

天下之至柔，驰骋于天下之至坚。
The world’s softest, permeates the world’s toughest.

Teachings

故人之所教，

亦议而教人。

故强梁者不得死，

我将以为学父。

Be careful what you preach from old teachings,

only those that stand the test of time, will I learn from.