Common experience shows how much rarer is moral courage than physical bravery. A thousand men will march to the mouth of the cannon where one man will dare espouse an unpopular cause. – Clarence Darrow, Resist Not Evil

Conservatism should guide; it usually paralyzes. – Martin H. Fischer (1879–1962)

I had an immense advantage over many others dealing with the problem inasmuch as I had no fixed ideas derived from long-established practice to control and bias my mind, and did not suffer from the general belief that whatever is, is right. – Henry Bessemer (discovered new method of producing steel)

Orthodoxy: That peculiar condition where the patient can neither eliminate an old idea nor absorb a new one. – Elbert Hubbard, The Note-Book, 1927