(3.) We are now to consider the condition of man’s obtaining this blessing, which, as it is expressed in this answer, was personal, perfect, and perpetual obedience.
1. He was obliged to perform obedience, which was agreeable to his character, as a subject, and thereby to own the sovereignty of his Creator, and Lawgiver, and the equity of his law, and his right to govern him, according to it, which obligation was natural, necessary, and indispensible.
2. This obedience was to be personal, that is, not performed by any other in his behalf, and imputed to him, as his obedience was to be imputed to all his posterity; and therefore, in that respect, it would not have been personal, as applied to them; but as the obedience of Christ is imputed to us in the second covenant.
3. It was to be perfect, without the least defect, and that both in heart and life. He was obliged to do every thing that God required, as well as abstain from every thing that he forbade him; therefore we are not to suppose, that it was only his eating the forbidden fruit that would ruin him, though that was the particular sin by which he fell; since his doing any other thing, that was in itself sinful, or his neglecting any thing that was required, would equally have occasioned his fall.
But since we are considering man’s obligation to yield obedience to the divine law, it follows from hence, that it was necessary that there should be an intimation given of the rule, or matter of his obedience, and consequently that the law of God should be made known to him; for it is absolutely necessary, not only that a law should be enacted, but promulgated, before the subject is bound to obey it. Now the law of God was made known to man two ways, agreeable to the twofold distinction thereof.
1st, The law of nature was written on his heart, in which the wisdom of God did as much discover itself, as in the subject matter of this law. In this respect, the whole law of nature might be said to be made known to him at once; the knowledge of which was communicated to him, with the powers and faculties of his soul, and was, as it were, instamped on his nature; so that he might as well plead, that he was not an intelligent creature, as that he was destitute of the knowledge of this law.
2dly, As there were, besides this, several other positive laws, that man was obliged to yield obedience to, though these could not, properly speaking, be said to be written on his heart; yet he had the knowledge hereof communicated to him. Whether this was done all at once, or at various times, it is not for us to determine; however, this we must conclude, that these positive laws could not be known in a way of reasoning, as the law of nature might. But, since we have sufficient ground to conclude, that God was pleased, in different ways and times, to communicate his mind and will to man, we are not to suppose that he was destitute of the knowledge of all those positive laws, that he was obliged to obey.
What the number of these laws was, we know not; but, as there have been, in all ages, various positive laws relating to instituted worship, doubtless, Adam had many such laws revealed to him though not mentioned in scripture. This I cannot but observe, because some persons use such modes of speaking about this matter, as though there were no other positive law, that man was obliged to obey but that of his not eating of the tree of knowledge of good and evil, or, together with it, that which related to the observation of the sabbath.[[48]]
4. The obedience, which man was to perform, was to be perpetual; by which we are not to understand, that it was to be performed to eternity, under the notion of a condition of the covenant, though it certainly was, as this covenant contained in it the obligation of a law. The reason of this is very obvious; for, when any thing is performed, as a condition of obtaining a subsequent blessing it is supposed that this blessing is not to be conferred till the condition is performed. But that is inconsistent with the eternal duration of this obedience, on the performance whereof the heavenly blessedness was to be conferred; and therefore, though divines often use the word perpetual, when treating on this subject, it must be understood with this limitation, that man was to obey, without any interruption or defect, so long as he remained in a state of probation; and this obedience had a peculiar reference to the dispensation, as it was federal: but, when this state of trial was over, and the blessing, promised on this condition, conferred, then, though the same obedience was to be performed to eternity, it would not be considered as the condition of a covenant, but as the obligation of a law. And this leads us to enquire,
Whether we may not, with some degree of probability, without being guilty of a sinful curiosity, determine any thing relating to the time of man’s continuance in a state of trial, before the blessing promised, at least, that part of it, which consisted in the grace of confirmation, would have been conferred upon him. Though I would not enter into any subject that is over-curious, or pretend to determine that which is altogether uncertain, yet, I think this is not to be reckoned so, especially if we be not too peremptory, or exceed the bounds of modesty, in what respects this matter. All that I shall say, concerning it, is, that it seems very probable that our first parents would have continued no longer in this state of probation, but would have attained the grace of confirmation, which is a considerable circumstance in the blessing promised in this covenant, as soon as they had children arrived to an age capable of obeying, or sinning, themselves, which, how long that would have been, it is a vain thing to pretend to determine.