书籍是最好的老师。

美即是真，真即是美——这就是你们在世上所知道、也该知道的一切。

Logic is the mirror of thought.

Freedom is not merely the opportunity to do as one pleases; neither is it merely the opportunity to choose between set alternatives. Freedom is, first of all, the chance to formulate the available choices, to argue over them - and then, the opportunity to choose.