““A man’s status in both business and social life depends mainly upon what he has done to develop his brain. As a chemical product, a man is said to be worth about four shillings. That is all that Sir Isaac Newton was worth. Or, Shakespeare. Or, Kelvin. As a body, a man may be worth about £3 a week or possibly £5. That is the value of muscle and bone. But as a brain, a man may be worth millions of pounds. If he wants to put his price up, he must make a better use of his head.””