2. For as the different strings of the psaltery or the lyre, each of which gives forth a note of its own seemingly unlike that of any other, are thought by an unmusical man who does not understand the theory of harmony to be discordant, because of the difference in the notes: so they who have not ears to detect the harmony of God in the sacred Scriptures suppose that the Old Testament is not in harmony with the New, or the Prophets with the Law, or the Gospels with one another, or an Apostle with the Gospel, or with himself, or with the other Apostles. But if a reader comes who has been instructed in God's music, a man who happens to be wise in word and deed, and on that account, it may be, called David, which being interpreted is "a cunning player," he will produce a note of God's music, for he will have learned from God's music to keep good time, playing now upon the strings of the Law, now upon those of the Gospel in harmony with them, now upon those of the Prophets; and when the harmony of good sense is required he strikes the apostolic strings tuned to suit the foregoing, and, similarly, apostolic strings in harmony with those of Evangelists. For he knows that the whole Scripture is the one, perfect, harmonious instrument of God, blending the different notes, for those who wish to learn, into one song of salvation, which stops and hinders all the working of an evil spirit, as the music of David laid to rest the evil spirit in Saul which was |44 vexing him. You observe, then, that there is a third kind of peacemaker, he who keeping close to the Scripture both sees the peace which pervades it everywhere, and bestows it on those who rightly seek the truth and are really eager to learn.