Unless a man has been taught what to do with success after getting it, the achievement of it must inevitably leave him a prey to boredom.

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.

Understanding human nature must be the basis of any real improvement in human life. Science has done wonders in mastering the laws of the physical world, but our own nature is much less understood, as yet, than the nature of stars and electrons. When science learns to understand human nature, it will be able to bring a happiness into our lives which machines and the physical sciences have failed to create.

Whatever we know without inference is mental.

But I simply can't stand a view limited to this earth, I feel life is so small unless it has windows into other worlds...I like mathematics largely because it is not human.

Mathematics may be defined as the subject in which we never know what we are talking about, nor whether what we are saying is true.

Curious learning not only makes unpleasant things less unpleasant but also makes pleasant things more pleasant.