In the course of our speculation on Divine Providence we proceed next to the consideration of the doctrine of the depravity of human reason: a doctrine derogatory to the nature of man, and the rank and character of being which he holds in the universe, and which, if admitted to be true overturns knowledge and science and renders learning, instruction and books useless and impertinent; inasmuch as reason, depraved or spoiled, would cease to be reason; as much as the mind of a raving madman would of course cease to be rational: admitting the depravity of reason, the consequence would unavoidably follow, that as far as it may be supposed to have taken place in the midst of mankind, there could be no judges of it, in consequence of their supposed depravity; for without the exercise of reason, we could not understand what reason is, which would be necessary for us previously to understand, in order to understand what it is not; or to distinguish it from that which is its reverse. But for us to have the knowledge of what reason is, and the ability to distinguish it from that which is depraved, or is irrational, is incompatible with the doctrine of the depravity of our reason. Inasmuch as to understand what reason is, and to distinguish it from that which is marred or spoiled, is the same to all intents and purposes, as to have, exercise and enjoy, the principle of reason itself, which precludes its supposed depravity: so that it is impossible for us to understand what reason is, and at the same time determine that our reason is depraved; for this would be the same as when we know that we are in possession and exercise of reason, to determine that we are not in possession or exercise of it.
It may be, that some who embrace the doctrine of the depravity of human reason, will not admit that it is wholly and totally depraved, but that it is in a great measure marred or spoiled. But the foregoing arguments are equally applicable to a supposed depravity in parts, as in the whole; for in order to judge whether reason be depraved in part or not, it would be requisite to have an understanding of what reason may be supposed to have been, previous to its premised depravity; and to have such a knowledge of it, would be the same as to exercise and enjoy it in its lustre and purity, which would preclude the notion of a depravity in part, as well as in the whole; for it would be utterly impossible for us to judge of reason undepraved and depraved, but by comparing them together. But for depraved reason to make such a comparison, is contradictory and impossible; so that, if our reason had been depraved, we could not have had any conception of it any more than a beast. Men of small faculties in reasoning cannot comprehend the extensive reasonings of their superiors, how then can a supposed depraved reason comprehend that reason which is uncorrupted and pure? To suppose that it could, is the same as to suppose that depraved and undepraved reason is alike, and if so, there needs no further dispute about it.
There is a manifest contradiction in applying the term depraved to that of reason, the ideas contained in their respective definitions will not admit of their association together, as the terms convey heterogeneous ideas; for reason spoiled, marred, or robbed of its perfection, ceaseth to be rational, and should not be called reason; inasmuch as it is premised to be depraved, or degenerated from a rational nature; and in consequence of the deprivation of its nature, should also be deprived of its name, and called subterfuge, or some such like name, which might better define its real character.
Those who invalidate reason, ought seriously to consider, "whether they argue against reason, with or without reason; if with reason, then they establish the principle, that they are laboring to dethrone:" but if they argue without reason, (which, in order to be consistent with themselves, they must do,) they are out of the reach of rational conviction, nor do they deserve a rational argument.
We are told that the knowledge of the depravity of reason, was first communicated to mankind by the immediate inspiration of God. But inasmuch as reason is supposed to be depraved, what principle could there be in the human irrational soul, which could receive or understand the inspiration, or on which it could operate so as to represent to those whom it may be supposed were inspired, the knowledge of the depravity of (their own and mankind's) reason (in general:) for a rational inspiration must consist of rational ideas, which pre-sup-poses that the minds of those who were inspired, were rational previous to such inspiration, which would be a downright contradiction to the inspiration itself; the import of which was to teach the knowledge of the depravity of human reason, which without reason could not be understood, and with reason it would be understood, that the inspiration was false.
Will any advocates for the depravity of reason suppose, that inspiration ingrafts or superadds the essence of reason itself to the human mind? Admitting it to be so, yet such inspired persons could not understand any thing of reason, before the reception of such supposed inspiration; nor would such a premised inspiration prove to its possessors or receivers, that their reason had ever been depraved. All that such premised inspired persons could understand, or be conscious of, respecting reason, would be after the inspiration may be supposed to have taken effect, and made them rational beings, and then instead of being taught by inspiration, that their reason had been previously depraved, they could have had no manner of consciousness of the existence or exercise of it, until the impairing the principle of it by the supposed energy of inspiration; nor could such supposed inspired persons communicate the knowledge of such a premised revelation to others of the species, who for want of a rational nature, could not be supposed, on this position, to be able to receive the impressions of reason.
That there are degrees in the knowledge of rational beings, and also in their capacities to acquire it, cannot be disputed, as it is so very obvious among mankind. But in all the retrospect gradations from the exalted reasonings of a Locke or a Newton, down to the lowest exercise of it among the species, still it is reason, and not depraved; for a less degree of reason by no means implies a depravity of it, nor does the imparting of reason argue its depravity, for what remains of reason, or rather of the exercise of it, is reason still. But there is not, and cannot be such a thing as depraved reason, for that which is rational is so, and for that reason cannot be depraved, whatever its degree of exercise may be supposed to be.
A blow on the head, or fracture of the cranium, as also palsies and many other casualties that await our sensorium, retard, and in some cases wholly prevent the exercise of reason for a longer or shorter period; and sometimes through the stage of human life; but in such instances as these, reason is not depraved, but ceases in a greater or less degree, or perhaps wholly ceases its rational exertions or operations; by reason of the breaches or disorders of the organs of sense, but in such instances, wherein the organs become rectified, and the senses recover their usefulness, the exercise of reason returns, free from any blemish or depravity. For the cessation of the exercise of reason, by no means depraves it.
From what has been argued on this subject, in this and the preceding chapters, it appears that reason is not and cannot be depraved, but that it bears a likeness to divine reason, is of the same kind, and in its own nature as uniform as truth, which is the test of it; though in the divine essence, it is eternal and infinite, but in man it is eternal only as it respects their immortality, and finite as it respects capaciousness. Such people as can be prevailed upon to believe, that their reason is depraved, may easily be led by the nose, and duped into superstition at the pleasure of those in whom they confide, and there remain from generation to generation: for when they throw by the law of reason the only one which God gave them to direct them in their speculations and duty, they are exposed to ignorant or insidious teachers, and also to their own irregular passions, and to the folly and enthusiasm of those about them, which nothing but reason can prevent or restrain: nor is it a rational supposition that the commonality of mankind would ever have mistrusted that their reason was depraved, had they not been told so, and it is whispered about, that the first insinuation of it was from the Priests; (though the Armenian Clergymen in the circle of my acquaintance have exploded the doctrine.) Should we admit the depravity of reason, it would equally affect the priesthood, or any other teachers of that doctrine, with the rest of mankind; but for depraved creatures to receive and give credit to a depraved doctrine, started and taught by depraved creatures, is the greatest weakness and folly imaginable, and comes nearer a proof of the doctrine of total depravity, than any arguments which have been advanced in support of it.