Thus at every step we are reminded that we by no means rule over nature like a conqueror over a foreign people, like someone standing outside nature - but that we, with flesh, blood and brain, belong to nature, and exist in its midst, and that all our mastery of it consists in the fact that we have the advantage over all other creatures of being able to learn its laws and apply them correctly.

I would never die for my beliefs because I might be wrong.

There was never a good war, or a bad peace.

He might have been encased in a thick glass bubble, so separate did he feel from his three dining companions. It was a sensation with which he was only too familiar, that of walking in a giant sphere of worry, enclosed by it, watching his own terrors roll by, obscuring the outside world.

There are no foreign lands. It is the traveler only who is foreign.

Every period ruled by mystics was an era of stagnation and want, when most men were on strike against existence.