The key is to stay present and enjoy the moment.

I never buy anything unless I can give a good reason why I think it will go up.

将社会正义的梦想变为现实并不容易，但也不是不可能的。

人生最难的是知道该跨过哪座桥，又该烧掉哪座桥。

Psychology should concern itself not with static elements, but with the dynamic interplay between organism and environment.

Mathematics is not about numbers, equations, computations, or algorithms: it is about understanding.