证明是一种用于使他人相信数学陈述为真的工具。
A proof is a device for convincing someone else that a mathematical statement is true.
没有什么是确定的，也没有什么是不可能的。
Those who can endure the worst blows of fate are often the strongest individuals.
译文：期待有一天能在高远之处实现志向，然后坦然从容地前行。
The human soul needs actual beauty more than bread.
The key to performance is elegance, not battalions of special cases.