A proof is a way to convince yourself and others that something is true.
In the end, we only regret the chances we didn't take.
解释：往往在你觉得是轻而易举的时候，困难也就跟着来了。
所以富贵的人极其奢侈，二孤儿寡妇却受饥挨饿，虽然想天下不乱，也不可能。国君若真的希望天下太平而不希望天下大乱的话，如果要吃喝，就不能不节俭。
Never compromise on safety - it's the cornerstone of our industry.
在互联网时代，速度比完美更重要。