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.

Nothing is so exhausting as indecision, and nothing is so futile.

What is matter? Never mind.

Those who have never known the deep intimacy and the intense companionship of happy mutual love have missed the best thing that life has to give.

Formality Thus the absence of all mention of particular things or properties in logic or pure mathematics is a necessary result of the fact that this study is, as we say, "purely formal".

As soon as we abandon our own reason, and are content to rely upon authority, there is no end to our troubles.

The use of self control is like the use of brakes on train. It is useful when you find yourself in wrong direction but merely harmful when the direction is right