Excesses of this kind being guarded against, the Fathers lay down the thesis that, when employed in its proper place, no exercise is more useful than disputation. You will see not a few wholly taken up with reading, writing, arranging, and paging what they have written; but they eschew most carefully all disputation, neglecting it, looking upon it as an idle occupation, having all their Theology locked up, not so much in their memory and intelligence, as in their paper books. Men of authority, they go on to say, have always been persuaded that Philosophy and Theology are learnt, not so much by hearing, as by discussing. For, in this exercise, you have a most certain test how much a man understands of what he is writing about or teaching; also how much solidity there is in one's own private cogitations, since it happens not unfrequently that what appears brilliant in one's private room is seen to drag in the mud, when it comes to disputation.[256] Then, too, while we are hard pressed by our adversary, we are forced to strain every nerve of our wits, and, when others are bearing down heavily upon us, we knock out of our brains many things which would never have come into our heads, while we stayed in the quiet of leisure and rested in the shade. We hear things which others have found out, and which either throw light on doubtful points, or indicate the path to some other point. Or, if what is said does not commend itself to our judgment, we see through the opponent's artifice; we meet him with more facility, and establish our own thesis with more stability. The auditors, meanwhile, can take note of the good points one Professor makes, the strong points of another, and, after the example of their Doctors, they quicken their wits for the fray, observing where the arguments limp, which are the distinctions that tell, how the whole doctrine of a Professor hangs together. In short, it is well established by the authority of the gravest men, and by the test of experience, that one disputation does more good than many lectures; not to mention the other consideration, that there is nothing more calculated to render our schools illustrious, than making our students competent to win great approbation and applause, in public sessions and disputations.[257]