I have always preferred working on concrete problems rather than abstract theories.
翻译:仰观天上日月星辰,俯察地面山川原野,因此能够知晓幽隐和显明的各种事理。
我不喜欢被定义,因为我是多变的。
实现明天的唯一限制就是我们今天的怀疑。
The human mind is so complex and things are so tangled up with each other that, to explain a blade of grass, one would have to make a diagram of the universe.