数学是人类精神最美丽和最强大的创造。
Mathematics is the most beautiful and most powerful creation of the human spirit.
痛苦+反省=进步
The walls of a garden should be high enough to keep the world out, but low enough to let the sky in.
花园的墙应该足够高以将世界挡在外面,但又足够低以让天空进来。
The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion.