Marston Morse quotes:

Mathematics are the result of mysterious powers which no one understands, and which the unconscious recognition of beauty must play an important part. Out of an infinity of designs a mathematician chooses one pattern for beauty's sake and pulls it down to earth.

I work in celestial mechanics, but I am not interested in getting to the moon.

But mathematics is the sister, as well as the servant, of the arts and is touched with the same madness and genius.