Harmony of the Scripture
For as the different chords of the psalter or the lyre, each of which gives forth a certain sound of its own which seems unlike the sound of another chord, are thought by a man who is not musical and ignorant of the principle of musical harmony, to be inharmonious, because of the dissimilarity of the sounds, so those who are not skilled in hearing the harmony of God in the sacred Scriptures think that the Old is not in harmony with the New, or the Prophets with the Law, or the Gospels with one another, or the Apostle with the Gospel, or with himself, or with the other Apostles. But he who comes instructed in the music of God, being a man wise in word and deed, and, on this account, like another David—which is, by interpretation, skilful with the hand—will bring out the sound of the music of God, having learned from this at the right time to strike the chords, now the chords of the Law, now the Gospel chords in harmony with them, and again the Prophetic chords, and, when reason demands it, the Apostolic chords which are in harmony with the Prophetic, and likewise the Apostolic with those of the Gospels. For he knows that all the Scripture is the one perfect and harmonised instrument of God, which from different sounds gives forth one saving voice to those willing to learn, which stops and restrains every working of an evil spirit, just as the music of David laid to rest the evil spirit in Saul, which also was choking him.
— Origen, Commentary on the Gospel According to Matthew. II
Scripture Likened to a Net
And the kingdom of heaven is likened unto the variegated texture of a net, with reference to the Old and the New Scripture which is woven of thoughts of all kinds and greatly varied. As in the case of the fishes that fall into the net, some are found in one part of the net and some in another part, and each at the part at which it was caught, so in the case of those who have come into the net of the Scriptures you would find some caught in the prophetic net; for example, of Isaiah, according to this expression, or of Jeremiah or of Daniel; and others in the net of the law, and others in the Gospel net, and some in the apostolic net; for when one is first captured by the Word or seems to be captured, he is taken from some part of the whole net. And it is nothing strange if some of the fishes caught are encompassed by the whole texture of the net in the Scriptures, and are pressed in on every side and caught, so that they are unable to escape but are, as it were, absolutely enslaved, and not permitted to escape from the net. And this net has been cast into the sea—the wave—tossed life of men in every part of the world, and which swims in the bitter affairs of life. And before our Saviour Jesus Christ this net was not wholly filled; for the net of the law and the prophets had to be completed by Him who says, “Think not that I came to destroy the law and the prophets, I came not to destroy but to fulfil.” And the texture of the net has been completed in the Gospels, and in the words of Christ through the Apostles. On this account, therefore, “the kingdom of heaven is like unto a net that was cast into the sea and gathered of every kind.” And, apart from what has been said, the expression, “gathered from every kind,” may show forth the calling of the Gentiles from every race. And those who attended to the net which was cast into the sea are Jesus Christ, the master of the net, and “the angels who came and ministered unto Him,” who do not draw up the net from the sea, nor carry it to the shore beyond the sea,—namely, to things beyond this life, unless the net be filled full, that is, unless the “fulness of the Gentiles” has come into it.
— Origen. Commentary on the Gospel According to Matthew X.XII