默而识之，学而不厌，诲人不倦，何有于我哉。
【译文】将知识默记在心，学习时，不感到满足，教人时，不感到倦怠，这三方面我做到了哪些呢？
The stories are not autobiographical, but they're personal in that way. I seem to know only the things that I've learned. Probably some things through observation, but what I feel I know surely is personal.
The true test of a mathematical idea is its ability to inspire further questions.
艺术应该让舒适的人不安，让不安的人舒适。