O, Youth: Do you know that yours is not the first generation to yearn for a life full of beauty and freedom?

I believe my theory of relativity to be true. But it will only be proved for certain in 1981, when I am dead.

I am of the opinion that all the finer speculations in the realm of science spring from a deep religious feeling, and that without such feeling they would not be fruitful.

Consider the concepts referred to in the words 'where', 'when', 'why', 'being', to the elucidation of which innumerable volumes of philosophy have been devoted. We fare no better in our speculations than a fish which should strive to become clear as to what is water.

I was supposed to choose apractical profession, but this was simply unbearable to me.

I make it a rule not to clutter my mind with simple information that I can find in a book in five minutes.

The only reason for time is so that everything doesn't happen at once.