XIII. This will be made clear to you as follows:— Are not Spirit, and Fire, and Light, Love, and Wisdom, and Righteousness, and Mind and Reason, and the like, the names of the First Nature? What then? Can you conceive of Spirit apart from motion and diffusion; or of Fire without its fuel and its upward motion, and its proper colour and form? Or of Light unmingled with air, and loosed from that which is as it were its father and source? And how do you conceive of a mind? Is it not that which is inherent in some person not itself, and are not its movements thoughts, silent or uttered? And Reason...what else can you think it than that which is either silent within ourselves, or else outpoured (for I shrink from saying loosed)? And if you conceive of Wisdom, what is it but the habit of mind which you know as such, and which is concerned with contemplations either divine or human? And Justice and Love, are they not praiseworthy dispositions, the one opposed to injustice, the other to hate, and at one time intensifying themselves, at another relaxed, now taking possession of us, now leaving us alone, and in a word, making us what we are, and changing us as colours do bodies? Or are we rather to leave all these things, and to look at the Deity absolutely, as best we can, collecting a fragmentary perception of It from Its images? What then is this subtle thing, which is of these, and yet is not these, or how can that Unity which is in its Nature uncomposite and incomparable, still be all of these, and each one of them perfectly? Thus our mind faints to transcend corporeal things, and to consort with the Incorporeal, stripped of all clothing of corporeal ideas, as long as it has to look with its inherent weakness at things above its strength. For every rational nature longs for God and for the First Cause, but is unable to grasp Him, for the reasons I have mentioned. Faint therefore with the desire, and as it were restive and impatient of the disability, it tries a second course, either to look at visible things, and out of some of them to make a god...(a poor contrivance, for in what respect and to what extent can that which is seen be higher and more godlike than that which sees, that this should worship that?) or else through the beauty and order of visible things to attain to that which is above sight; but not to suffer the loss of God through the magnificence of visible things.
XIV. From this cause some have made a god of the Sun, others of the Moon, others of the host of Stars, others of heaven itself with all its hosts, to which they have attributed the guiding of the Universe, according to the quality or quantity of their movement. Others again of the Elements, earth, air, water, fire, because of their useful nature, since without them human life cannot possibly exist. Others again have worshipped any chance visible objects, setting up the most beautiful of what they saw as their gods. And there are those who worship pictures and images, at first indeed of their own ancestors— at least, this is the case with the more affectionate and sensual— and honour the departed with memorials; and afterwards even those of strangers are worshipped by men of a later generation separated from them by a long interval; through ignorance of the First Nature, and following the traditional honour as lawful and necessary; for usage when confirmed by time was held to be Law. And I think that some who were courtiers of arbitrary power and extolled bodily strength and admired beauty, made a god in time out of him whom they honoured, perhaps getting hold of some fable to help on their imposture.
XV. And those of them who were most subject to passion deified their passions, or honoured them among their gods; Anger and Blood-thirstiness, Lust and Drunkenness, and every similar wickedness; and made out of this an ignoble and unjust excuse for their own sins. And some they left on earth, and some they hid beneath the earth (this being the only sign of wisdom about them), and some they raised to heaven. O ridiculous distribution of inheritance! Then they gave to each of these concepts the name of some god or demon, by the authority and private judgment of their error, and set up statues whose costliness is a snare, and thought to honour them with blood and the steam of sacrifices, and sometimes even by most shameful actions, frenzies and manslaughter. For such honours were the fitting due of such gods. And before now men have insulted themselves by worshipping monsters, and fourfooted beasts, and creeping things, and of the very vilest and most absurd, and have made an offering to them of the glory of God; so that it is not easy to decide whether we ought most to despise the worshippers or the objects of their worship. Probably the worshippers are far the most contemptible, for though they are of a rational nature, and have received grace from God, they have set up the worse as the better. And this was the trick of the Evil One, who abused good to an evil purpose, as in most of his evil deeds. For he laid hold of their desire in its wandering in search of God, in order to distort to himself the power, and steal the desire, leading it by the hand, like a blind man asking a road; and he hurled down and scattered some in one direction and some in another, into one pit of death and destruction.
XVI. This was their course. But reason receiving us in our desire for God, and in our sense of the impossibility of being without a leader and guide, and then making us apply ourselves to things visible and meeting with the things which have been since the beginning, does not stay its course even here. For it was not the part of Wisdom to grant the sovereignty to things which are, as observation tells us, of equal rank. By these then it leads to that which is above these, and by which being is given to these. For what is it which ordered things in heaven and things in earth, and those which pass through air, and those which live in water; or rather the things which were before these, heaven and earth, air and water? Who mingled these, and who distributed them? What is it that each has in common with the other, and their mutual dependence and agreement? For I commend the man, though he was a heathen, who said, What gave movement to these, and drives their ceaseless and unhindered motion? Is it not the Artificer of them Who implanted reason in them all, in accordance with which the Universe is moved and controlled? Is it not He who made them and brought them into being? For we cannot attribute such a power to the Accidental. For, suppose that its existence is accidental, to what will you let us ascribe its order? And if you like we will grant you this: to what then will you ascribe its preservation and protection in accordance with the terms of its first creation. Do these belong to the Accidental, or to something else? Surely not to the Accidental. And what can this Something Else be but God? Thus reason that proceeds from God, that is implanted in all from the beginning and is the first law in us, and is bound up in all, leads us up to God through visible things. Let us begin again, and reason this out.
Source: Orations (New Advent)