在怀疑时，克制自己。
译文：枯萎的树木遇到春天还会发芽生长，可人没有两次青春年少的时期。赏析：人生短短的几十年转瞬即逝，我们要珍惜大好的青春年华。
The key to performance is elegance, not battalions of special cases.
Persistence is key in mathematical research; many great results come from looking at the same problem from different angles over and over again.