Exposition on the Psalms of David
Then when he says, "Give praise to the Lord," he sets forth the manner of praise and joy. Now it should be known that in the praise of God what is principally intended is that the affection of man should tend toward God and be directed to him. Likewise, the harmonies of music change a man's affection. Hence Pythagoras, seeing that a youth was going mad at the sound of the Phrygian mode, had the mode changed; and so he tempered the spirit of the frenzied youth to a most peaceful state of mind, as Boethius says in the preface to his work on music. Hence it is that it was devised that in every form of worship certain musical harmonies should be employed, so that the spirit of man might be stirred toward God. These harmonies have customarily been employed in two ways: sometimes with musical instruments, and sometimes with songs. And therefore first he shows the first mode, because "on the harp." Second, the second, at "Sing to him." For the affection of man is directed through instruments and musical harmonies in three ways: because sometimes it is established in a certain rectitude and firmness of soul; sometimes it is carried to sublimity; and sometimes to sweetness and joy. And for this purpose, as the Philosopher holds in Politics VIII, chapter 7, three kinds of song have been instituted. For the first, there is the Dorian song, which belongs to the first and second tones, as some hold. For the second, there is the Phrygian song, which belongs to the third tone. For the third, there is the Hypolydian song, which belongs to the fifth and sixth tones. The others were invented later. And so it is with instruments, because certain instruments produce the first effect, such as the pipe and the trumpet; certain produce the second, such as the organ; and certain the third, such as the psaltery and the harp: Ps. 80: "The pleasant psaltery with the harp." But because the Psalmist here intends to lead to exultation, he makes mention only of these two, namely the psaltery and the harp. But truly, because all these things happened to them in figure, 1 Cor. 10, they used not only these instruments for this purpose, but also in figure. The harp has its sound from below and signifies the praise that arises from things below, that is, earthly things. The psaltery, however, has its sound from above and signifies the praise that concerns heavenly goods. He says "of ten strings" because by them are signified the ten precepts of the Decalogue, in which the whole of spiritual teaching consists.
Oversæt med Google