The person who works and is never bored is never old. Work and interest in worthwhile things are the best remedy for age.

Real understanding does not come from what we learn in books; it comes from what we learn from love of nature, of music, of man. For only what is learned in that way is truly understood.

Say things to the world that are true.

The answer to helplessness is not so very complicated.

You must work, we must all work, to make the world worthy of its children.

I have always regarded manual labour as creative and looked with respect-and, yes, wonder-at people who work with their hands. It seems to me that their creativity is no less than that of a violinist or painter.

We ought to think that we are one of the leaves of a tree, and the tree is all humanity. We cannot live without the others, without the tree.