Psalms 147:1

It is said to us, "Praise the Lord." This is said to all nations, not to us alone. And these words, sounded forth through separate places by the Readers, each Church heareth separately; but the one same Voice of God proclaimeth unto all, that we praise Him. And as though we asked wherefore we ought to praise the Lord, behold what reason he hath brought forward: "Praise the Lord," he saith, "for a Psalm is good." Is this all the reward of them that praise? ...The "Psalm" is praise of God. This then he saith, "Praise the Lord, for it is good to praise the Lord." Let us not thus pass over the praise of the Lord. It is spoken, and hath passed: it is done, and we are silent: we have praised, and then rested; we have sung, and then rested. We go forth to some business which awaits us, and when other employments have found us, shall the praise of God cease in us? Not so: thy tongue praiseth but for a while, let thy life ever praise. Thus then "a Psalm is good." For a "Psalm" is a song, not any kind of song, but a song to a psaltery. A psaltery is a kind of instrument of music, like the lyre and the harp, and such kinds of instruments, which were invented for music. He therefore who singeth Psalms, not only singeth with his voice, but with a certain instrument besides, which is called a psaltery, he accompanieth his voice with his hands. Wilt thou then sing a Psalm? Let not thy voice alone sound the praises of God; but let thy works also be in harmony with thy voice. ...To please then the ear, sing with thy voice; but with thy heart be not silent, with thy life be not still.

Praise the Lord, for a psalm is good. The one hundred and forty-sixth psalm is headed with the title "Alleluia." Those who do not know the Hebrew language, when they see "alleluia" set at the head of a psalm, are wont to ask what it means. This psalm, then, has "alleluia" not only in its title, but also at the very opening of the psalm. For where it says "Praise the Lord," in the Hebrew it says "alleluia." For God among the Hebrews has ten names: he is called Sabaoth, he is called Saddai, he is called Eloim, he is called El, he is also called Iao, he is called Eser Iaia. Among the other names there is one name which is called "Ia." Now "Ia" is interpreted "invisible." Where therefore we say "praise," in the Hebrew it says "allelu." So here it says "allelu Ia," just as if one were to say "allelu Sabaoth," "allelu Saddai," "allelu Eloim": so therefore even now it says "allelu Ia." Finally Theodotion, who is one of the translators, wishing to declare the truth of the interpretation, says "praise Ia." Why have we said all this? So that we may know that in this psalm "alleluia" is set at the head. Praise the Lord. This interpretation, once we have gone out, will be pondered in your hearts; but for now the discourse will be extended further. Praise the Lord, for a psalm is good. He did not say "a good psalm," but absolutely, "a psalm is good": that is, it is a good thing to sing psalms. But to sing psalms not with the voice, but with the heart. How many have a good voice, and, because they are sinners, sing badly! He sings well who sings in his heart, who sings to Christ in his conscience. Let praise be pleasant to our God. Let the praise be pleasant, not with the voice, but with the conscience. Finally, Noah too offered victims, and the Lord smelled the odor of sweetness. There are many things that might be said: but we ought briefly to touch on the highest points, so that we may point out the meaning rather than broader words.