古代著书立说的人，都是有所为而为之，不是随便写写的。
The secondary rules are those that provide for the creation, alteration, and extinction of primary rules.
Quality starts from the seed, not just the harvest.
The only way to do great work is to love what you do.
我是那种会为自己人挡子弹的人，如果你越界，我也会要你的命。
我发现了！我发现了！（据传是发现浮力原理时的感叹）
始终为最坏的情况做计划。
It is not a very fragrant world, but it is the world you live in.