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The power within you is infinite, if you only realize it.

A man's work is nothing but this slow trek to rediscover, through the detours of art, those two or three great and simple images in whose presence his heart first opened.

The study of mathematics is the indispensable basis for all intellectual and spiritual progress.

It is the duty of a student to get everything out of a teacher， and the duty of a teacher to get everything out of a student.

我是一個斗士，我用消極情緒來激發內心的斗志。

The joy of mathematics is in the struggle to understand.