It is certainly true that principles cannot be more securely founded than on experience and consciously clear thinking.

No fairer destiny could be allotted to any physical theory than that it should of itself point out the way to the introduction of a more comprehensive theory, in which it lives on as a limiting case.

It is the duty of every citizen according to his best capacities to give validity to his convictions in political affairs.

There is a driving force more powerful than steam, electricity and nuclear power: the will.

I prefer to make up my own quotes and attribute them to very smart people, so that I can use them to win arguments

When you examine the lives of the most influential people who have ever walked among us, you discover one thread that winds through them all. They have been aligned first with their spiritual nature and only then with their physical selves.

A photograph never grows old. You and I change, people change all through the months and years but a photograph always remains the same. How nice to look at a photograph of mother or father taken many years ago. You see them as you remember them. But as people live on, they change completely. That is why I think a photograph can be kind.