Pessimism leads to weakness. Optimism leads to power.

Our life is always deeper than we know, is always more divine than it seems, and hence we are able to survive degradations and despairs which otherwise must engulf us.

In the deepest heart of all of us there is a corner in which the ultimate mystery of things works sadly.

I don't sing because I'm happy; I'm happy because I sing.

But it is the bane of psychology to suppose that where results are similar, processes must be the same. Psychologists are too apt to reason as geometers would, if the latter were to say that the diameter of a circle is the same thing as its semi-circumference, because, forsooth, they terminate in the same two points.

The attitude of unhappiness is not only painful, it is mean and ugly.

On pragmatistic principles, if the hypothesis of God works satisfactorily in the widest sense of the word, it is true.