The purpose of abstraction is not to be vague, but to create a new semantic level in which one can be absolutely precise.
A good mathematician should be both rigorous and imaginative.
Acting is not about being someone different. It's finding the similarity in what is apparently different, then finding myself in there.
That which is, is peace. All that we need do is to keep quiet.
心理学家必须是一个公正的观察者。
Learning is not a matter of trial and error, but of insight.