Verse 18. - He sendeth out his word, and melteth them (comp. ver. 15). God has only to "speak the word," and all trace of winter disappears - hoar-frost, hail, snow, melt away, and the atmosphere is once more soft and genial. He causeth his wind to blow. The change usually comes With a change of wind, which, as with ourselves, is commonly cold from the north and east, warm from the west and south. And the waters flow. A thaw sets in, and soon all the watercourses are full of rushing streams.

147:12-20 The church, like Jerusalem of old, built up and preserved by the wisdom, power, and goodness of God, is exhorted to praise him for all the benefits and blessings vouchsafed to her; and these are represented by his favours in the course of nature. The thawing word may represent the gospel of Christ, and the thawing wind the Spirit of Christ; for the Spirit is compared to the wind, Joh 3:8. Converting grace softens the heart that was hard frozen, and melts it into tears of repentance, and makes good reflections to flow, which before were chilled and stopped up. The change which the thaw makes is very evident, yet how it is done no one can say. Such is the change wrought in the conversion of a soul, when God's word and Spirit are sent to melt it and restore it to itself.He sendeth out his word, and melteth them,.... The snow, the hoar frost, and ice: this he does by a word of his, who can freeze the earth and waters, and thaw them at his pleasure; by ordering the sun to break forth with great heat, or rain to fall in great plenty; of both which Kimchi interprets his word; as well as by causing a warm wind to blow, as follows,

he causeth his wind to blow, and the waters to flow: the south wind particularly; then the waters, which were still and motionless, flow as before, or more abundantly. Thus the hearts of men in a state of nature are like frozen earth or waters; they are cold, and without the heat of love, and affection to God and Christ, and spiritual things; they are as hard as a stone, and without any motion or desire after things divine and heavenly: but when the Lord sends his word, attended with a divine power and efficacy, it breaks and melts them; when the south wind of the blessed Spirit blows upon them, or his grace becomes effectual in convincing them of sin, righteousness, and judgment; and when the sun of righteousness arises on them with healing in his wings; with which being warmed, they are loosened, and flow to the Lord and his goodness for all spiritual blessings.