The realization that electronic properties can be topologically protected has revolutionized our understanding of solid-state physics.

The sociological imagination enables its possessor to understand the larger historical scene in terms of its meaning for the inner life and the external career of a variety of individuals.

Every soul is a star.

The main task in life is simply this: to identify and separate matters so that I can say clearly to myself which are externals not under my control, and which have to do with the choices I actually control.

Immigration has a much smaller effect on native wages than most people believe.

I became insane， with long intervals of horrible sanity.