Mere unbelief in a personal God is no philosophy at all.

The special theory of relativity owes its origins to Maxwell's equations of the electromagnetic field.

The release of atomic energy has not created a new problem. It has merely made more urgent the necessity of solving an existing one.

It is a very high goal which, with our weak powers, we can reach only very inadequately, but which gives a sure foundation to our aspirations and valuations.

There does, in fact, appear to be a plan.

Everything that can be counted does not necessarily count; everything that counts cannot necessarily be counted.

All these primary impulses, not easily described in words, are the springs of man's actions.