精金美玉般的品性，一定是经历过了，烈火一样的磨砺才修成的；惊天动地的大事业，必须要有履薄冰临深渊般的胆识和魄力，才能成就。

There are no mistakes in art, only unexpected discoveries.

As to the gods, I do not know whether they exist or not, nor what they are like in form; for there are many things that hinder sure knowledge, the obscurity of the matter and the shortness of human life.

Art is the only place where failure is celebrated.

Virtue can only flourish amongst equals.