We are asleep. Our Life is a dream. But we wake up sometimes, just enough to know that we are dreaming.

It is one of the chief skills of the philosopher not to occupy himself with questions which do not concern him.

For a truly religious man nothing is tragic.

The world of those who are happy is different from the world of those who are not.

Russell's books should be bound in two colours, those dealing with mathematical logic in red - and all students of philosophy should read them; those dealing with ethics and politics in blue - and no one should be allowed to read them.

My day passes between logic, whistling, going for walks, and being depressed. I wish to God that I were more intelligent and everything would finally become clear to me - or else that I needn't live much longer.

Nothing is so difficult as not deceiving oneself.