The most important tool in science is not the microscope, but the mind.
The greatest danger is not that we will lose our way, but that we will become content with where we are.
我们生命中最美好的时刻不是被动的、接受的、放松的时刻...最美好的时刻通常发生在一个人自愿努力完成一项困难而有价值的事情时,身体或精神被拉伸到极限的时候。
Certification standards are meaningless without rigorous enforcement.