Now, as there are two great functions of the soul, contemplation and practise, according to that general division of objects, some of which only entertain our speculation, others also employ our actions, so the understanding, with relation to these, not because of any distinction in the faculty itself, is accordingly divided into speculative and practical; in both of which the image of God was then apparent.
1. For the understanding speculative. There are some general maxims and notions in the mind of man which are the rules of discourse and the basis of all philosophy: as, that the same thing can not at the same time be and not be; that the whole is bigger than a part; that two dimensions, severally equal to a third, must also be equal to one another. Aristotle, indeed, affirms the mind to be at first a mere tabula rasa, and that these notions are not ingenit, and imprinted by the finger of nature, but by the later and more languid impressions of sense, being only the reports of observation, and the result of so many repeated experiments.
(1.) That these notions are universal, and what is universal must needs proceed from some universal, constant principle, the same in all particulars, which here can be nothing else but human nature.
(2.) These can not be infused by observation, because they are the rules by which men take their first apprehensions and observations of things, and therefore, in order of nature, must needs precede them; as the being of the rule must be before its application to the thing directed by it. From whence it follows that these were notions not descending from us, but born with us, not our offspring, but our brethren; and, as I may so say, such as we were taught without the help of a teacher.
Now it was Adam's happiness in the state of innocence to have these clear and unsullied. He came into the world a philosopher, which sufficiently appeared by his writing the nature of things upon their names; he could view essences in themselves, and read forms without the comment of their respective properties; he could see consequents yet dormant in their principles, and effects yet unborn and in the womb of their causes; his understanding could almost pierce into future contingents; his conjectures improving even to prophecy, or the certainties of prediction; till his fall, it was ignorant of nothing but sin, or at least it rested in the notion, without the smart of the experiment. Could any difficulty have been proposed, the resolution would have been as early as the proposal; it could not have had time to settle into doubt. Like a better Archimedes, the issue of all his inquiries was a eureka, a eureka, the offspring of his brain without the sweat of his brow. Study was not then a duty, night-watchings were needless, the light of reason wanted not the assistance of a candle. This is the doom of fallen man, to labor in the fire, to seek truth in profundo, to exhaust his time and impair his health, and perhaps to spin out his days and himself into one pitiful, controverted conclusion. There was then no poring, no struggling with memory, no straining for invention; his faculties were quick and expedite, they answered without knocking, they were ready upon the first summons.
2. The image of God was no less resplendent in that which we call man's practical understanding; namely, that storehouse of the soul in which are treasured up the rules of action, and the seeds of morality; where, we must observe, that many who deny all connate notions in the speculative intellect, do yet admit them in this. Now of this sort are these maxims, "That God is to be worshiped, that parents are to be honored, that a man's word is to be kept," and the like; which, being of universal influence, as to the regulation of the behavior and converse of mankind, are the ground of all virtue and civility, and the foundation of religion.
It was the privilege of Adam innocent, to have these notions also firm and untainted, to carry his monitor in his bosom, his law in his heart, and to have such a conscience as might be its own casuist; and certainly those actions must needs be regular where there is an identity between the rule and the faculty. His own mind taught him a due dependence upon God, and chalked out to him the just proportions and measures of behavior to his fellow creatures. He had no catechism but the creation, needed no study but reflection, read no book but the volume of the world, and that too, not for the rules to work by, but for the objects to work upon. Reason was his tutor, and first principles his magna moralia. The decalogue of Moses was but a transcript, not an original. All the laws of nations, and wise decrees of states, the statutes of Solon, and the twelve tables, were but a paraphrase upon this standing rectitude of nature, this fruitful principle of justice, that was ready to run out and enlarge itself into suitable demonstrations upon all emergent objects and occasions.
And this much for the image of God, as it shone in man's understanding.
II. Let us in the next place take a view of it as it was stamped upon the will. It is much disputed by divines concerning the power of man's will to good and evil in the state of innocence: and upon very nice and dangerous precipices stand their determinations on either side. Some hold that God invested him with a power to stand so that in the strength of that power received, he might, without the auxiliaries of any further influence, have determined his will to a full choice of good. Others hold that notwithstanding this power, yet it was impossible for him to exert it in any good action without a superadded assistance of grace actually determining that power to the certain production of such an act; so that whereas some distinguish between sufficient and effectual grace, they order the matter so as to acknowledge some sufficient but what is indeed effected, and actually productive of good action. I shall not presume to interpose dogmatically in a controversy which I look never to see decided. But concerning the latter of these opinions, I shall only give these two remarks:
1. That it seems contrary to the common and natural conceptions of all mankind, who acknowledge themselves able and sufficient to do many things which actually they never do.