一门科学的历史就是它的问题域的历史。

Symbols are the medium of thought.

The healthy social life is found when in the mirror of each human soul the whole community finds its reflection, and when in the community the virtue of each one is living.

Every minute on stage is the accumulation of ten years of practice off stage.

最难的事情是简单。

身份不是固定的；它是流动的，不断演变的。