A hundred times every day I remind myself that my inner and outer life are based on the labors of other men, living and dead, and that I must exert myself in order to give in the same measure as I have received and am still receiving...

"I am not interested in the individual, but in the whole."

The past is never dead. It's not even past.

Simplicity can be the most powerful thing.

板块构造理论是地质学的统一理论。