3. The law also, which you call divine, moral, and eternal, is that which is naturally seated in the heart, and as you yourself express it, is originally the dictates of human nature, or that which mankind doth naturally assent to (p. 11).
Now I say, that a man cannot by these principles, and these qualifications, please the God of heaven, is apparent. (1.) Because none of these are faith, 'But without faith it is impossible to please him' (Heb 11:6). (2.) Because none of these are of the Holy Ghost, but there is nothing accepted of God, under a New Testament consideration, but those which are the fruits of the Spirit (Gal 5:22-24). (3.) The man and principles you have stated, may be such as are utterly ignorant of Jesus Christ, and of all his New Testament things, as such: 'But the natural man receiveth not the things of the Spirit of God: [the things of his New Testament] for they are foolishness unto him: neither can he know them, because they are spiritually discerned' (1 Col 2:14). (4.) Your qualifications and considerations, know nothing at all of the adoption of sons, and of our acting and doing our duty as such. You only content yourself to rest within the confines of the human nature, acts of reason, as men or creatures only, or in their supposed pure, natural principles.
And Sir, a little by way of digression; I will tell you also of our truly Christian righteousness, both as to its original or first principle; and also how, or under what capacity, it puts the person that is acted by it.
First, The principle which is laid within us, it is not the purity of the human nature, but of the Holy Ghost itself, which we have of God received, by believing in the Son of God, a principle as far above yours of humanity, as is the heavens above the earth; yours being but like those of the first Adam, but ours truly those of the second (1 Col 6:19). 'As is the earthy, such are they also that are earthy: and as is the heavenly, such are they also that are heavenly' (1 Cor 15:48).
Now whosoever hath not this principle, although he be a creature, and also have the dictates of the human nature, yea, and also follows them, yet he is not Christ's: 'If any man have not the Spirit of Christ, he is none of his' (Rom 8:9). Thus therefore is the Christian principle another from, and far above, your heathenish Pagan one. By this Spirit is the Christian qualified with principles, not natural, but spiritual, such as faith, hope, joy, peace, &c. all which are the fruits of the revelation of the forgiveness of sins, freely by grace (Gal 5:25), 'through the redemption that is in Jesus Christ' (Rom 3:24). In this spirit and faith we walk, by this spirit we are led (Rom 8:14), even into the joy and peace of the New Testament of our Lord; wherefore our holy actions are the fruits of righteousness, that is by Jesus Christ, not by our human nature, or the purity of it in us; yea, they are the fruits of the Spirit of God, the qualifications that attend the new covenant, and those that by the work of regeneration are brought within the bounds and privileges thereof. Wherefore,
Second, The capacity that we are in, who act and do from the heavenly principle; it is that of sons, the sons of God by adoption, as the apostle said, 'Because ye are sons, God hath sent forth the Spirit of his Son into your hearts, crying, Abba, Father' (Gal 4:6). And again, 'As many as are led by the Spirit of God, they are the sons of God' (Rom 8:14). This is a far other than is your human description of acting as a creature, endued with a principle of reason; for here is a man acts as a son, endued with the Holy Spirit of God, who hath, before the world was, predestinated him to this estate, by Jesus Christ, to himself (Eph 1:4, 4:6). As a son therefore, the Christian acts and does, because he is endued with that high and heavenly principle mentioned before; by which principle this man hath received a new heart, a new spirit, a new understanding, a good conscience, so made by 'faith in the blood of the Lord Jesus' (Heb 10). Thus being made again anew and another man, he acts from a new and another principle than yours; a principle as far beyond and above you, as is a man above a brute, and as is grace above nature (2 Col 5:14-16).
Third, As the Christian acts and does from a better principle, and under a better capacity or consideration than that you have described; so (to allude to your own notion) the first principles by which they receive this spirit and adoption, are not those principles of morals, or those originally dictates of human nature; but it is through the hearing of faith (Gal 3:1-3), by which we understand, that the Son of God became a man, died for our sins, hath saved us from the curse of God, and accounted us to be the righteousness of God in him; this being heard with the gospel, and a New Testament hearing, the Holy Ghost forthwith possesseth us, by the glorious working whereof we are helped, through the Son, to call the God of heaven, our Father.
Now thus being made free from sin, by the only faith of Jesus Christ, 'we have our fruit unto holiness, and the end everlasting life' (Rom 6:22).
And here come in those reasonable conclusions, which you would make the very radicals of Christianity, they being only remote, and after conclusions, drawn from the fore-mentioned mercy of God, viz., from predestination, calling, adoption, and justification by Christ's blood, while we in ourselves are sinners. I say these are the things which Paul endeavoured to provoke the Romans, Philippians, and Colossians, to an holy conversation by.
To the Romans, 'I beseech you therefore,' saith he, 'by the mercies of God, (What mercies? Why those of election, redemption, calling, justification, and adoption, mentioned in the foregoing chapters) that ye present your bodies a living sacrifice, holy, acceptable unto God, which is your reasonable service' (Rom 12:1).