Sit down before fact as a little child, be prepared to give up every preconceived notion, follow humbly wherever and to whatever abysses nature leads, or you shall learn nothing.
— Thomas Huxley

Above all things we must beware of what I will call “inert ideas” — that is to say, ideas that are merely received into the mind without being utilized, or tested, or thrown into fresh combinations.
— Alfred North Whitehead