Guard against the prestige of great names; see that your judgments are your own; and do not shrink from disagreement; no trusting without testing.
Source: Inaugural Lecture on The Study of History, Cambridge, 11 Jun 1895.
-- John Dalberg Acton, (Jan 10 1834-1902), English historian; He was a noted Christian liberal who edited The Rambler and planned the Cambridge Modern History.