Mathematics is not a spectator sport.
数学不是一项观赏性运动。
The opposite of a correct statement is a false statement. But the opposite of a profound truth may well be another profound truth.
要理解宇宙,我们必须首先理解自己。
I'm not a present, I'm a gift.
"最危险的怪物是我们内心携带的那些。"