11 But, supposing that these things do not at all hinder or prevent your being bound to believe and hearken to them in great measure; and what reason is there either that you should have more liberty in this respect, or that we should have less? You believe Plato, Cronius, Numenius, or any one you please; we believe and confide in Christ. How unreasonable it is, that when we both abide by teachers, and have one and the same thing, belief, in common, you should wish it to be granted to you to receive what is so said by them, but should be unwilling to hear and see what is brought forward by Christ!
And yet, if we chose to compare cause with cause, we are better able to point out what we have followed in Christ, than you to point out what you have followed in the philosophers. And we, indeed, have followed in him these things— those glorious works and most potent virtues which he manifested and displayed in diverse miracles, by which any one might be led to feel the necessity of believing, and might decide with confidence that they were not such as might be regarded as man's, but such as showed some divine and unknown power.
What virtues did you follow in the philosophers, that it was more reasonable for you to believe them than for us to believe Christ? Was any one of them ever able by one word, or by a single command, I will not say to restrain, to check the madness of the sea or the fury of the storm; to restore their sight to the blind, or give it to men blind from their birth; to call the dead back to life; to put an end to the sufferings of years; but— and this is much easier — to heal by one rebuke a boil, a scab, or a thorn fixed in the skin?
Not that we deny either that they are worthy of praise for the soundness of their morals, or that they are skilled in all kinds of studies and learning; for we know that they both speak in the most elegant language, and that their words flow in polished periods; that they reason in syllogisms with the utmost acuteness; that they arrange their inferences in due order; that they express, divide, distinguish principles by definitions; that they say many things about the different kinds of numbers, many things about music; that by their maxims and precepts they settle the problems of geometry also.
But what has that to do with the case? Do enthymemes, syllogisms, and other such things, assure us that these men know what is true? Or are they therefore such that credence should necessarily be given to them with regard to very obscure subjects? A comparison of persons must be decided, not by vigour of eloquence, but by the excellence of the works which they have done. He must not be called a good teacher who has expressed himself clearly, but he who accompanies his promises with the guarantee of divine works.
Source: Against the Heathen (New Advent)