A rat in a maze is free to go anywhere, as long as it stays inside the maze.
You have to be able to laugh at yourself, to not take yourself too seriously.
我们不能把问题留给下一代解决，我们现在就必须尽自己的一份力。
The fundamental point in fabricating a chain reacting machine is of course to see to it that each fission produces a certain number of neutrons and some of these neutrons will again produce fission.
The soul speaks in symbols, not in words.
