Mathematics is not a spectator sport. You have to get involved.

如果你不说出你的想法，那么你就扼杀了你未出生的自我。

革命就像骑自行车，如果不前进就会倒下。

Life is not easy for any of us. But what of that? We must have perseverance and above all confidence in ourselves. We must believe that we are gifted for something and that this thing must be attained.