The fact that we can describe the motions of the world using Newtonian mechanics tell us nothing about the world. The fact that we do, does tell us something about the world.

There are, indeed, things that cannot be put into words. They make themselves manifest. They are what is mystical.

Could one imagine a stone's having consciousness? And if anyone can do so-why should that not merely prove that such image-mongery is of no interest to us?

Courage, not cleverness; not even inspiration, is the grain of mustard that grows up to be a great tree.

The real question of life after death isn't whether or not it exists, but even if it does what problem this really solves.

How small a thought it takes to fill a life.

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.