Every great advance in science has issued from a new audacity of imagination.
我们对现实的感知是由我们的期望和过去的经验塑造的。
The art of being wise is the art of knowing what to overlook.
The improver of natural knowledge absolutely refuses to acknowledge authority as such.  
The poverty of our century is unlike that of any other. It is not, as poverty was before, the result of natural scarcity, but of a set of priorities imposed upon the rest of the world by the rich.