“If one is a research worker, one mustn’t believe in anything too strongly; one must always be…”

“If one is a research worker, one mustn’t believe in anything too strongly; one must always be prepared that various beliefs one has had for a long time may be overthrown.”

Paul Dirac, quoted in The Strangest Man: The Hidden Life of Paul Dirac, Mystic of the Atom, p. 376. Graham Farmelo, Basic Books, 2009.