The course of true anything never does run smooth.
If a man knows not life which he hath seen, how shall he know death, which he hath not seen?
History is a bucket of ashes.
Flying. Whatever any other organism has been able to do man should surely be able to do also, though he may go a different way about it.
Business should be like religion and science; it should know neither love nor hate.
I am the enfant terrible of literature and science. If I cannot, and I know I cannot, get the literary and scientific bigwigs to give me a shilling, I can, and I know I can, heave bricks into the middle of them.