I know quite certainly that I myself have no special talent; curiosity, obsession and dogged endurance, combined with self-criticism, have brought me to my ideas.

It is difficult to say what truth is, but sometimes it is so easy to recognize a falsehood.

I believe we are here to do good. It is the responsibility of every human being to aspire to do something worthwhile, to make the world a better place than the one we found.

Marvellous, what ideas the young people have these days. But I don't believe a word of it.

The most important tool of the theoretical physicist is his wastebasket.

This has been done elegantly by Minkowski; but chalk is cheaper than grey matter, and we will do it as it comes.

The scientific theorist is not to be envied. For Nature, or more precisely experiment, is an exorable and not very friendly judge of his work. It never says "yes" to a theory. In the most favorable cases it says "Maybe," and in the great majority of cases simply "No." If an experiment agrees with a theory it means for the latter "Maybe," and if it does not agree it means "No." Probably every theory will some day experience its "No" - most theories, soon after conception.