Psalms 19:4

(Heb.: 19:5-7) Since אמר and דברים are the speech and words of the heavens, which form the ruling principal notion, comprehending within itself both יום and לילה, the suffixes of קוּם and מלּיהם must unmistakeably refer to השׁמים in spite of its being necessary to assign another reference to קולם in Psa 19:4. Jer 31:39 shows how we are to understand קו in connection with יצא. The measuring line of the heavens is gone forth into all the earth, i.e., has taken entire possession of the earth. Psa 19:5 tells us what kind of measuring line is intended, viz., that of their heraldship: their words (from מלּה, which is more Aramaic than Hebrew, and consequently more poetic) reach to the end of the world, they fill it completely, from its extreme boundary inwards. Isaiah's קו, Psa 28:1-9 :10, is inapplicable here, because it does not mean commandment, but rule, and is there used as a word of derision, rhyming with צו. The ὁ φθόγγος αὐτῶν of the lxx (ὁ ἦχος αὐτῶν Symm.) might more readily be justified, inasmuch as קו might mean a harpstring, as being a cord in tension, and then, like τόνος (cf. τοναία), a tone or sound (Gesenius in his Lex., and Ewald), if the reading קולם does not perhaps lie at the foundation of that rendering. But the usage of the language presents with signification of a measuring line for קו when used with יצא (Aq. κανών, cf. Co2 10:13); and this gives a new thought, whereas in the other case we should merely have a repetition of what has been already expressed in Psa 19:4. Paul makes use of these first two lines of the strophe in order, with its very words, to testify to the spread of the apostolic message over the whole earth. Hence most of the older expositors have taken the first half of the Psalm to be an allegorical prediction, the heavens…

There are two excellent books which the great God has published for the instruction and edification of the children of men; this psalm treats of them both, and recommends them both to our diligent study. I. The book of the creatures, in which we may easily read the power and godhead of the Creator (Psa 19:1-6). II. The book of the scriptures, which makes known to us the will of God concerning our duty. He shows the excellency and usefulness of that book (Psa 19:7-11) and then teaches us how to improve it (Psa 19:12-14). To the chief musician. A psalm of David.