"The difference between the poet and the mathematician is that the poet tries to get his head into the heavens while the mathematician tries to get the heavens into his head."
"A dead thing goes with the stream, but only a living thing can go against it."
"Romance is the deepest thing in life. It is deeper than reality."
"Merely having an open mind is nothing. The object of opening the mind, as of opening the mouth, is to shut it again on something solid."
"But there is in everything a reasonable division of labour. I have written the book, and nothing on earth would induce me to read it."
"Great truths can only be forgotten and can never be falsified."