Then shall we know, [if] we follow on to know the Lord
The word "if" is not in the original text, and the passage is not conditional, but absolute; for as persons, when converted, know Christ, and not before, when he is revealed to them, and in them, as the only Saviour and Redeemer, so they continue and increase in the knowledge of him; they earnestly desire to know more of him, and eagerly pursue those means and methods by which they attain to a greater degree of it; for so the words are, "and we shall know, we shall follow on to know the Lord" F20; that grace, which has given the first measure of spiritual and experimental knowledge of him, will influence and engage them to seek after more. The Jews, when they are quickened, and turn to the Lord, will know him, own and acknowledge him, as the Messiah, the only Redeemer and Saviour; and will be so delighted with the knowledge of him, that they will be desirous of, and seek after, a larger measure of it; and indeed they shall all know him, from the least to the greatest, when the covenant of grace shall be renewed with them, manifested and applied to them. The words may be considered as a continuation of their exhortation to one another from ( Hosea 6:1 ) ; thus, "and let us acknowledge, let us follow on to know him" F21; let us own him as the true Messiah, whom we and our fathers have rejected; and let us make use of all means to gain more knowledge of him: or let us follow after him, to serve and obey him, which is the practical knowledge of him; let us imitate him, and follow him the Lamb of God, embrace his Gospel, and submit to his ordinances. So Kimchi interprets it, "to know him"; that is, to serve him; first know him, then serve him; his going forth is prepared as the morning;
that is, the Lord's going forth, who is known, and followed after to be more known; and is to be understood, not of his going forth in the council and covenant of grace from everlasting; nor of his incarnation in time, or of his resurrection from the dead; but of his spiritual coming in the latter day, with the brightness of which he will destroy antichrist; or of his going forth in the ministration of the Gospel, to the conversion of Jews and Gentiles, the light of which dispensation will be very great; it will be like a morning after a long night of darkness with the Jewish and Pagan nations; and be as grateful and delightful, beautiful and cheerful, as the morning light; and move as swiftly and irresistibly as that, and be alike growing and increasing: and so the words are a reason of the increasing knowledge of the Lord's people in those times, because he shall go forth in the ministration of the word like the morning light, which increases more and more till noon; and of the evidence and clearness of it, it being like a morning without clouds; with which agrees the note of Joseph Kimchi,
``we shall know him, and it will be as clear to us as the light of the morning without clouds:''and also of the firmness and certainty of it; for both the increasing knowledge of the saints, and the going forth of Christ in a spiritual manner, is "firm" and "sure" (which may be the sense of the word F23) as the morning; for, as sure as the night cometh, so also the morning; and he shall come unto us as the rain, as the latter [and] former rain
``and we shall learn, and we shall follow on, to know the fear of the Lord, as the morning light, which darts in its going out; and blessings will come to us as a prevailing rain, and as the latter rain which waters the earth.''