A leader does not deserve the name unless he is willing occasionally to stand alone.

Sometimes you can do everything right and things will still go wrong. The key is to never stop doing right.

育儿不是一门科学，而是一种关系。

人类大脑是社交大脑，它的进化是为了处理社会关系。

The alternation of motion is ever proportional to the motive force impressed; and is made in the direction of the right line in which that force is impressed.