Man is, at one and the same time, a solitary being and a social being.

There is no logical way to the discovery of these elemental laws. There is only the way of intuition, which is helped by a feeling for the order lying behind the appearance.

Success = 1 part work + 1 part play + 1 part keep your mouth shut

The secret to creativity is knowing how to hide your sources.

The world is not full of evil because of those who do wrong. It is full of evil because of those who do nothing.

It is the same with people as it is with riding a bike. Only when moving can one comfortably maintain one's balance.

Our death is not an end if we can live on in our children and the younger generation. For they are us; our bodies are only wilted leaves on the tree of life.