34 This is, believe me, a most wholesome authority, this a lifting up first of our mind from dwelling on the earth, this a turning from the love of this world unto the True God. It is authority alone which moves fools to hasten unto wisdom. So long as we cannot understand pure (truths), it is indeed wretched to be deceived by authority, but surely more wretched not to be moved. For, if the Providence of God preside not over human affairs, we have no need to busy ourselves about religion.
But if both the outward form of all things, which we must believe assuredly flows from some fountain of truest beauty, and some, I know not what, inward conscience exhorts, as it were, in public and in private, all the better order of minds to seek God, and to serve God; we must not give up all hope that the same God Himself has appointed some authority, whereon, resting as on a sure step, we may be lifted up unto God. But this, setting aside reason, which (as we have often said) it is very hard for fools to understand pure, moves us two ways; in part by miracles, in part by multitude of followers: no one of these is necessary to the wise man; who denies it?
But this is now the business in hand, that we may be able to be wise, that is, to cleave to the truth; which the filthy soul is utterly unable to do: but the filth of the soul, to say shortly what I mean, is the love of any things whatsoever save God and the soul: from which filth the more any one is cleansed, the more easily he sees the truth. Therefore to wish to see the truth, in order to purge your soul, when as it is purged for the very purpose that you may see, is surely perverse and preposterous.
Therefore to man unable to see the truth, authority is at hand, in order that he may be made fitted for it, and may allow himself to be cleansed; and, as I said a little above, no one doubts that this prevails, in part by miracles, in part by multitude. But I call that a miracle, whatever appears that is difficult or unusual above the hope or power of them who wonder. Of which kind there is nothing more suited for the people, and in general for foolish men, than what is brought near to the senses.
But these, again, are divided into two kinds; for there are certain, which cause only wonder, but certain others procure also great favor and good-will. For, if one were to see a man flying, inasmuch as that matter brings no advantage to the spectator, beside the spectacle itself, he only wonders. But if any affected with grievous and hopeless disease were to recover straightway, upon being bidden, his affection for him who heals, will go beyond even his wonder at his healing.
Such were done at that time at which God in True Man appeared unto men, as much as was enough. The sick were healed, the lepers were cleansed; walking was restored to the lame, sight to the blind, hearing to the deaf. The men of that time saw water turned into wine, five thousand filled with five loaves, seas passed on foot, dead rising again: thus certain provided for the good of the body by more open benefit, certain again for the good of the soul by more hidden sign, and all for the good of men by their witness to Majesty: thus, at that time, was the divine authority moving towards Itself the wandering souls of mortal men.
Why, say you, do not those things take place now? Because they would not move, unless they were wonderful, and, if they were usual, they would not be wonderful. For the interchanges of day and night, and the settled order of things in Heaven, the revolution of years divided into four parts, the fall and return of leaves to trees, the boundless power of seeds, the beauty of light, the varieties of colors, sounds, tastes, and scents, let there be some one who shall see and perceive them for the first time, and yet such an one as we may converse with; he is stupified and overwhelmed with miracles: but we contemn all these, not because they are easy to understand, (for what more obscure than the causes of these?) but surely because they constantly meet our senses.
Therefore they were done at a very suitable time, in order that, by these a multitude of believers having been gathered together and spread abroad, authority might be turned with effect upon habits.
Source: On the Profit of Believing (New Advent)