Happiness is the key to life. Without happiness, you have nothing.
快乐是生活的关键。没有快乐,你就一无所有。
态度上的弱点会变成性格上的弱点。
在绘画中,手必须跟随眼睛,而眼睛必须跟随灵魂。
Mathematics is not a spectator sport. You have to do it to understand it.
Art is the language of the unspeakable.