Science tells us what we can know, but what we can know is little, and if we forget how much we cannot know we become insensitive to many things of great importance.

Although it is a gloomy view to suppose that life will die out, sometimes when I contemplate the things that people do with their lives I think it is almost a consolation

We know too much and feel too little.

Philosophy bakes no bread

The search for something permanent is one of the deepest of the instincts leading men to philosophy.

The fact that all Mathematics is Symbolic Logic is one of the greatest discoveries of our age; and when this fact has been established, the remainder of the principles of mathematics consists of the analysis of Symbolic Logic itself.

I often long to . . . give up my life to love of my neighbour. This is really a temptation.