Learning consists in the modification of certain mediating processes which operate between the stimulus and the response.

The landscape of string theory is vast and complex, with perhaps 10^500 different possible universes.

I quite agree with them that it is not an ennobling experience. Poverty entails fear, and stress, and sometimes depression; it means a thousand petty humiliations and hardships. Climbing out of poverty by your own efforts, that is indeed something on which to pride yourself, but poverty itself is romanticised only by fools.

Every law is an infraction of liberty.

每一棵种植的树都是治愈地球的一步，但真正的改变需要系统性行动。