The dead are not powerless. Dead, did I say? There is no death, only a change of worlds.

未来は、自分で切り開くものだ。

要理解心灵，就要研究它在现实生活中的运作。

The minimum content of natural law is necessary for the survival of any society.

The whole problem with the world is that fools and fanatics are always so certain of themselves， and wiser people so full of doubts.

爱的反面是冷漠，幸福的反面是无聊。