(3.) He directs them to consult the oracles of God. If the prophets that were among them did not speak directly to every case, yet they had the written word, and to that they must have recourse. Note, Those will never be drawn to consult wizards that know how to make a good use of their Bibles. Would we know how we may seek to our God, and come to the knowledge of his mind? To the law and to the testimony. There you will see what is good, and what the Lord requires of you. Make God's statutes your counsellors, and you will be counselled aright. Observe, [1.] What use we must make of the law and the testimony: we must speak according to that word, that is, we must make this our standard, conform to it, take advice from it, make our appeals to it, and in every thing be overruled and determined by it, consent to those wholesome healing words (1 Tim. vi. 3), and speak of the things of God in the words which the Holy Ghost teaches. It is not enough to say nothing against it, but we must speak according to it. [2.] Why we must make this use of the law and the testimony: because we shall be convicted of the greatest folly imaginable if we do not. Those that concur not with the word of God do thereby evince that there is no light, no morning light (so the word is) in them; they have no right sense of things; they do not understand themselves, nor the difference between good and evil, truth and falsehood. Note, Those that reject divine revelation have not so much as human understanding; nor do those rightly admit the oracles of reason who will not admit the oracles of God. Some read it as a threatening: "If they speak not according to this word, there shall be no light to them, no good, no comfort or relief; but they shall be driven to darkness and despair;" as it follows here, v. 21, 22. What light had Saul when he consulted the witch? 1 Sam. xxviii. 18, 20. Or what light can those expect that turn away from the Father of lights?