| The measure of intelligence is the ability to change. |
| Look deep into nature, and you will understand everything better. |
| It has become appallingly obvious that our technology has exceeded our humanity. |
| As our circle of knowledge expands, so does the circumference of darkness surrounding it. |
| It is every man's obligation to put back into the world at least the equivalent of what he takes out of it. |
| The value of achievement lies in the achieving. |
| Most people say that is it is the intellect which makes a great scientist. They are wrong: it is character. |
| There are two ways to live: you can live as if nothing is a miracle; you can live as if everything is a miracle. |
| Peace cannot be kept by force; it can only be achieved by understanding. |
| Few people are capable of expressing with equanimity opinions which differ from the prejudices of their social environment. |
