Jeremiah 26:5

But what follows in the next verse ought to be especially observed; for these two things are necessarily connected, — that God required nothing but obedience to his Law, — and that his will was that his prophets should be heard, — To hearken, he says, to the words of my servants, the prophets, whom I send to you, (it is in the second person.) Here there seems to be some inconsistency; for if God’s Law was sufficient, why were the prophets to be heard? But these two things well agree together: the Law alone was to be attended to, and also the prophets, for they were its interpreters. For God sent not his prophets to correct the Law, to change anything in it, to add or to take away; as it was an unalterable decree, not to add to it nor to diminish from it. What then was the benefit of sending the prophets? even to make more manifest the Law, and to apply it to the circumstances of the people. As then the prophets devised no new doctrine, but were faithful interpreters of the Law, God joined, not without reason, these two things together, — that his Law was to be heard and also his prophets; for the majesty of the Law derogated nothing from the authority of the prophets; and as the prophets confirmed the Law, it could not have been that they took away anything from the Law.

Nay, this passage teaches us, that all those who repudiate the daily duty of learning, are profane men, and extinguish as far as they can the grace of the Spirit; many such fanatics among the Anabaptists have been in our time, who despised learning of every kind. They boasted that the doctrine of the Law was the Alphabet; and they also indulged in this dream, that wrong is done to the Holy Spirit when men attend to learning. And some dare, in a grosser manner, to vomit forth their blasphemies; they say that Scripture is enough for us, yea, even these two things, “Fear God and love thy neighbor.” But as I have already said, we must consider how God has spoken by his Law; whether he has closed up the way, so as not to explain his will more clearly by the prophets, nor to apply to present use what would have otherwise been less effectual? or that he purposed to draw continually by various channels the doctrine which flows from that fountain? But now, since God had given his own Law, and had added to the Law his prophets, every one who rejected the prophets must surely ascribe no authority to the Law. Even so now, they who think it not their duty at this day to seek knowledge in the school of Christ, and to avail themselves of the hearing of his word, no doubt despise God in their hearts, and set no value either on the Law, or on the prophets, or on the Gospel. Remarkable then is this passage; it shews that the Lord would have his Law to be our leader and teacher, and yet he adds his own prophets.