保持一颗永不僵硬的心，一种永不疲倦的性情，以及一种永不伤人的态度。

过去是一个异国他乡；他们在那里做不同的事情。

Around computers it is difficult to find the correct unit of time to measure progress. Some cathedrals took a century to complete. Can you imagine the grandeur and scope of a program that would take as long?

真理不是为所有人准备的，而是为那些寻求它的人准备的。

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.