实现明天的唯一限制将是我们今天的怀疑。

心理学研究的正确方向是行为的预测和控制。

There is no true liberty without the liberty of thought.

There is no perfection only life.

Self-education is, I firmly believe, the only kind of education there is.

我们都在等待什么，即使我们不知道那是什么。

The only thing that stands between you and your dream is the will to try and the belief that it is actually possible.

The art of competing, I’d learned from track, was the art of forgetting, and I now reminded myself of that fact. You must forget your limits. You must forget your doubts, your pain, your past.