But you will perhaps seek to know the cause of this error of judgment; for it is to this point that the train of our discussion tends. Again, then, we shall be justified in expecting to find some starting-point which will throw light on this inquiry also. An argument such as the following we have received by tradition from the Fathers; and this argument is no mere mythical narrative, but one that naturally invites our credence. Of all existing things there is a twofold manner of apprehension, the consideration of them being divided between what appertains to intellect and what appertains to the senses; and besides these there is nothing to be detected in the nature of existing things, as extending beyond this division.
Now these two worlds have been separated from each other by a wide interval, so that the sensible is not included in those qualities which mark the intellectual, nor this last in those qualities which distinguish the sensible, but each receives its formal character from qualities opposite to those of the other. The world of thought is bodiless, impalpable, and figureless; but the sensible is, by its very name, bounded by those perceptions which come through the organs of sense.
But as in the sensible world itself, though there is a considerable mutual opposition of its various elements, yet a certain harmony maintained in those opposites has been devised by the wisdom that rules the Universe, and thus there is produced a concord of the whole creation with itself, and the natural contrariety does not break the chain of agreement; in like manner, owing to the Divine wisdom, there is an admixture and interpenetration of the sensible with the intellectual department, in order that all things may equally have a share in the beautiful, and no single one of existing things be without its share in that superior world.
For this reason the corresponding locality of the intellectual world is a subtitle and mobile essence, which, in accordance with its supramundane habitation, has in its peculiar nature large affinity with the intellectual part. Now, by a provision of the supreme Mind there is an intermixture of the intellectual with the sensible world, in order that nothing in creation may be thrown aside as worthless, as says the Apostle, or be left without its portion of the Divine fellowship.
On this account it is that the commixture of the intellectual and sensible in man is effected by the Divine Being, as the description of the cosmogony instructs us. It tells us that God, taking dust of the ground, formed the man, and by an inspiration from Himself He planted life in the work of His hand, that thus the earthy might be raised up to the Divine, and so one certain grace of equal value might pervade the whole creation, the lower nature being mingled with the supramundane.
Since, then, the intellectual nature had a previous existence, and to each of the angelic powers a certain operation was assigned, for the organization of the whole, by the authority that presides over all things, there was a certain power ordained to hold together and sway the earthly region, constituted for this purpose by the power that administers the Universe. Upon that there was fashioned that thing moulded of earth, an “image” copied from the superior Power. Now this living being was man.
In him, by an ineffable influence, the godlike beauty of the intellectual nature was mingled. He to whom the administration of the earth has been consigned takes it ill and thinks it not to be borne, if, of that nature which has been subjected to him, any being shall be exhibited bearing likeness to his transcendent dignity. But the question, how one who had been created for no evil purpose by Him who framed the system of the Universe in goodness fell away, nevertheless, into this passion of envy, it is not a part of my present business minutely to discuss; though it would not be difficult, and it would not take long, to offer an account to those who are amenable to persuasion.
For the distinctive difference between virtue and vice is not to be contemplated as that between two actually subsisting phenomena; but as there is a logical opposition between that which is and that which is not, and it is not possible to say that, as regards subsistency, that which is not is distinguished from that which is, but we say that nonentity is only logically opposed to entity, in the same way also the word vice is opposed to the word virtue, not as being any existence in itself, but only as becoming thinkable by the absence of the better.
As we say that blindness is logically opposed to sight, not that blindness has of itself a natural existence, being only a deprivation of a preceding faculty, so also we say that vice is to be regarded as the deprivation of goodness, just as a shadow which supervenes at the passage of the solar ray. Since, then, the uncreated nature is incapable of admitting of such movement as is implied in turning or change or alteration, while everything that subsists through creation has connection with change, inasmuch as the subsistence itself of the creation had its rise in change, that which was not passing by the Divine power into that which is; and since the above-mentioned power was created too, and could choose by a spontaneous movement whatever he liked, when he had closed his eyes to the good and the ungrudging like one who in the sunshine lets his eyelids down upon his eyes and sees only darkness, in this way that being also, by his very unwillingness to perceive the good, became cognisant of the contrary to goodness.
Now this is Envy. Well, it is undeniable that the beginning of any matter is the cause of everything else that by consequence follows upon it, as, for instance, upon health there follows a good habit of body, activity, and a pleasurable life, but upon sickness, weakness, want of energy, and life passed in distaste of everything; and so, in all other instances, things follow by consequence their proper beginnings. As, then, freedom from the agitation of the passions is the beginning and groundwork of a life in accordance with virtue, so the bias to vice generated by that Envy is the constituted road to all these evils which have been since displayed.
For when once he, who by his apostacy from goodness had begotten in himself this Envy, had received this bias to evil, like a rock, torn asunder from a mountain ridge, which is driven down headlong by its own weight, in like manner he, dragged away from his original natural propension to goodness and gravitating with all his weight in the direction of vice, was deliberately forced and borne away as by a kind of gravitation to the utmost limit of iniquity; and as for that intellectual power which he had received from his Creator to co-operate with the better endowments, this he made his assisting instrument in the discovery of contrivances for the purposes of vice, while by his crafty skill he deceives and circumvents man, persuading him to become his own murderer with his own hands.
For seeing that man by the commission of the Divine blessing had been elevated to a lofty pre-eminence (for he was appointed king over the earth and all things on it; he was beautiful in his form, being created an image of the archetypal beauty; he was without passion in his nature, for he was an imitation of the unimpassioned; he was full of frankness, delighting in a face-to-face manifestation of the personal Deity),— all this was to the adversary the fuel to his passion of envy.
Yet could he not by any exercise of strength or dint of force accomplish his purpose, for the strength of God's blessing over-mastered his own force. His plan, therefore, is to withdraw man from this enabling strength, that thus he may be easily captured by him and open to his treachery. As in a lamp when the flame has caught the wick and a person is unable to blow it out, he mixes water with the oil and by this devices will dull the flame, in the same way the enemy, by craftily mixing up badness in man's will, has produced a kind of extinguishment and dulness in the blessing, on the failure of which that which is opposed necessarily enters.
For to life is opposed death, to strength weakness, to blessing curse, to frankness shame, and to all that is good whatever can be conceived as opposite. Thus it is that humanity is in its present evil condition, since that beginning introduced the occasions for such an ending.
Source: The Great Catechism (New Advent)