Philosophy is an unusually ingenious attempt to think fallaciously.

Science may set limits to knowledge, but should not set limits to imagination.

Most of the greatest evils that man has inflicted upon man have come through people feeling quite certain about something which, in fact, was false.

Too little liberty brings stagnation, and too much brings chaos.

One is always a little afraid of love, but above all, one is afraid of pain or causing pain.

No satisfaction based upon self-deception is solid, and however unpleasant the truth may be, it is better to face it once and for all, to get used to it, and to proceed to build your life in accordance with it.

Our instinctive emotions are those that we have inherited from a much more dangerous world, and contain, therefore, a larger portion of fear than they should.