The most important political distinction among countries concerns not their form of government but their degree of government.
行为由当前刺激情境和过去的强化历史决定。
The truth is, the science of Nature has been already too long made only a work of the brain and the fancy: It is now high time that it should return to the plainness and soundness of observations on material and obvious things.
"We are not seven, we are one. We are bulletproof."
"The best way to predict the future is to invent it."