I don’t think about the past or the future. I focus on the present.

数学的力量在于它简化复杂事物的能力。

The only thing worse than training employees and losing them is not training them and keeping them.

Man is always something more than what he knows about himself. He is not what he is simply once and for all, but is a process.

I'm the reason your flowers won't bloom.

If you worried about falling off the bike, you'd never get on.