That the Scriptures are also strict injunctions of Divine Authority concerning our duties. The reason of our faith and obedience to the Scriptures, is into their Divine Authority, which as it is the greatest of all, so upon less we may not depend…God is infallible in his understanding, faithful in his declarations, and so highly deserves our assent. He is Almighty and most true, and therefore we believe and hope in the promises of his word. As God, he hath a right to command, and we as creatures are obliged to obey, and so we receive his commands. God’s authority only could justly make us believe, obey, and fear, what is there declared, promised, commanded, and threatened.
There is a place of Scripture which the Papists do impertinently allege for the obscurity, (i.e.) the dishonor of God’s word, which as it is nothing to their purpose, so it doth most excellently serve to prove what we have in hand. ὑμῶν τοῦτο πρῶτον γινώσκοντες ὅτι πᾶσα προφητεία γραφῆς ἰδίας ἐπιλύσεως οὐ γίνεται. Knowing this first, that no prophecy of Scripture is of any interpretation. The design of the Apostle was the same with mine, to exhort Christians to give heed to Scriptures, as such Oracles which could not deceive them. He affirms the prophetic word surer than a private revelation, which he , James and John had in the Mount, and commends the diligent heed they gave to it, till the day-star should arise, peradventure till the truth of the prophecies of Christ shined forth in their accomplishment. But the stress of all this hope in the Scriptures, lies upon this, that none of them were ἰδίας ἐπιλύσεως, private impulse; meaning, as Saint Paul says in other words, πᾶσα γραφὴ θεόπνευστος. All Scripture is divinely inspired. And this appears by the verse that follows. For prophecy came not in old time by the will of man: but holy men of God spake as they were moved by the Holy Ghost. So that ἰδίας ἐπιλύσεως οὐ γίνεται signifies they are not of men’s private will, but from the divine spirit. The Prophets did not go on their own head, as we say, but on God’s errand. When God reproved those that went without his biding, he says thus, I sent them not, and yet they ran. (Jer. 23:21). So that the fence will be, those holy men who delivered the Scriptures, upon which you rely, wrote not what came into their minds as from themselves, but they set down God’s will.
Nathaniel Ingelo, The Perfection, Authority, and Credibility of the Holy Scriptures. Discoursed in a sermon before the University of Cambridge at the Commencement, July 4, 1658 (London: Printed by E.T. for Luke Fawn at the sign of the Parrot in Pauls Church-yard, 1659), 35-38.