A professor is not one who knows, but one who professes to know, and [thus] is constantly in the position of inviting challenge. . . . He professes publicly where everyone is invited to come and challenge, [and] at any time he must be willing and able to defend it openly against all comers. The degree is originally a chivalric device-a gauntlet of defiance to all rivals-and not a safe rampart or dug-out for a scholar to hide behind in safe immunity from any challenge.

Being self-taught is no disgrace; but being self-certified is another matter.

The worst sinners, according to Jesus, are not the harlots and publicans, but the religious leaders with their insistence on proper dress and grooming, their careful observance of all the rules, their precious concern for status symbols, their strict legality, their pious patriotism... the haircut becomes the test of virtue in a world where Satan deceives and rules by appearances.

The unique value of Christianity lies in those things which would never in a million years occur to men if left to themselves.

It is throwing our life away, to think of the wrong things.

Wherever we look in the ancient world the past has been controlled, but nowhere more rigorously than in the history of the Christian church. The methods of control, wherever we find them, fall under three general heads which might be described as (a) the invention, (b) the destruction, and (c) the alteration of documents.

All scholarship, like all science, is an ongoing, open-ended discussion in which all conclusions are tentative forever, the principal value and charm of the game being the discovery of the totally unexpected.