The sculpture is already complete within the marble block, before I start my work. It is already there, I just have to chisel away the superfluous material.

The only limits you have are the ones you set for yourself.

你无法从那样的失去中恢复；你只能学会与之共存。

最重要的行动从来都不会让人感到舒适。

To do mathematics is to explore a universe of ideas, where the only limit is your imagination.