For he maketh small the drops of water - Elihu now appeals, as he proposed to do, to the works of God, and begins with what appeared so remarkable and inexplicable, the wisdom of God in the rain and the dew, the tempest and the vapor. That which excited his wonder was, the fact in regard to the suspension of water in the clouds, and the distilling of it on the earth in the form of rain and dew. This very illustration had been used by Eliphaz for a similar purpose (Notes, Job 5:9-10), and whether we regard it as it "appears" to people without the light which science has thrown upon it, or look at the manner in which God suspends water in the clouds and sends it down in the form of rain and dew, with all the light which has been furnished by science, the fact is one that evinces in an eminent degree the wisdom of God. The word which is rendered "maketh small" (גרע gâra‛), means properly "to scrape off, to detract, to diminish, to take away from." In the Piel, the form used here, it means, according to Gesenius, "to take to one's self, to attract;" and the sense here, according to this, is, that God attracts, or draws upward the drops of water. So it is rendered by Herder, Noyes, Umbreit, and Rosenmuller. The idea is, that he "draws up" the drops of the water to the clouds, and then pours them down in rain. If the meaning in our common version be retained, the idea would be, that it was proof of great wisdom in God that the water descended in "small drops," instead of coming down in a deluge; compare the notes at Job 26:8.
They pour down rain - That is, the clouds pour down the rain.
According to the vapour thereof - - לאדו le'êdô. The idea seems to be, that the water thus drawn up is poured down again in the form of a "vapory rain," and which does not descend in torrents. The subject of admiration in the mind of Elihu was, that water should evaporate and ascend to the clouds, and be held there, and then descend again in the form of a gentle rain or fine mist. The reason for admiration is not lessened by becoming more fully acquainted with the laws by which it is done than Elihu can be supposed to have been.

He maketh small the drops of water - This appears simply to refer to evaporation, and perhaps it would be better to translate יגרע yegara, "he exhales;" detaches the smallest particles of the aqueous mass from the surface in order to form clouds, as reservoirs for the purpose of furnishing rain for the watering of the earth. God is seen in little things, as well as great things; and the inconceivably little, as well as the stupendously great, are equally the work of Omnipotence.
They pour down rain - These exceedingly minute drops or vapor become collected in clouds; and then, when agitated by winds, etc. many particles being united, they become too heavy to be sustained by the air in which they before were suspended, and so fall down in rain, which is either a mist, a drizzle, a shower, a storm, or a waterspout, according to the influence of different winds, or the presence and quantum of the electric fluid. And all this is proportioned, לאדו le-edo, "to its vapor," to the quantity of the fluid evaporated and condensed into clouds.

For he maketh small the drops of water: they (s) pour down rain according to the vapour thereof:
(s) That is, the rain comes from those drops of water which he keeps in the clouds.

For he maketh small the drops of rain,.... Elihu proceeds to give instances and proofs of the greatness of God, and begins with rain, as Eliphaz does, Job 5:9; a common phenomenon, what is very frequent, and well known in all ages and countries, and by all men, more or less; and yet there are some things relative to it which are beyond the comprehension of men, and show the greatness and incomprehensibleness of God: and the design of this, and all other instances of this kind, is to convince Job of his folly in searching out the causes and reasons of God's works of providence, when the common works of nature lie out of the reach of men; and to reconcile him to them, and bring him patiently to submit to the will of God, whose ways are past finding out; and some render the words, "he restrains the drops of rain" (g); he withholds it from the earth, which causes a drought, and so brings on a famine; others, "he subtracts", or draws out, or draws up, the drops of water (h), which he exhales by the heat of the sun out of the earth and out of the sea; see Psalm 135:7, Amos 5:8; and which are drawn up in small particles, but form large bodies of waters in the clouds; and which are let down again upon the earth in small drops, in an easy and gentle manner, and so soak into the earth and make it fruitful; which is what is meant by our version here: this is a wonderful instance of God's power, wisdom, and goodness, and is beyond our comprehension; for no mortal man can tell how the Almighty parts and divides those large quantities of water in the clouds, that sometimes hang over our heads, into millions and ten thousand times ten thousand millions of drops, even innumerable; and causes these waters in such a manner to descend on the earth; lets them not fall at once, or in waterspouts, which would wash away the inhabitants of cities and towns, the cattle of the field, and the produce of the earth, as at the general deluge;
they pour down rain according to the vapour thereof: the water, drawn up and formed into large bodies in the heavens, pours down rain in a gentle and plentiful manner, according to the quantity of vapours exhaled out of the earth and sea; if a small quantity is drawn up, a small quantity is let down; and if a large quantity is attracted, a large quantity, or a plentiful shower, is given: some think that a small rain is meant in the preceding clause, and a great rain in this; for there is the small rain and the great rain of his strength, Job 37:6. The word translated "pour" has the signification of liquefying, melting, and dissolving, and of purging and purifying; and which is applicable to clouds which melt and dissolve gradually as they descend in drops upon the earth; and the water which they let down is of all the most clear and pure, as Galen and Hippocrates (i), those eminent physicians, have observed; and a late celebrated one tells us (k), that rain water is so truly distilled by nature, that the chemist, with all his distilling art, cannot produce purer water; for, though it is exhaled out of the dirty earth, out of miry places, bogs, and ditches, yet, being bound up in the clouds as in a garment, and passing through the atmosphere, it comes down to us pure as if it had been percolated or strained through a linen cloth; and though the water as drawn up out of the sea is salt, yet carried up into the air, and there, as in an alembic, distilled, it descends to us sweet and fresh, and has not the least brackishness in it.
(g) "aufert stillas pluviae et prohibebit", Pagninus; so Vatablus, Tigurine version, Targum, & Ben Gersom. (h) "Attrahit", Codurcus; "subtrahit", i.e. "a mare", Junius & Tremellius, Piscator, Schultens. (i) Apud Pinedam in loc. (k) Boerhaav. Elem. Chem. p. 600. apud Schultens in loc.

The marvellous formation of rain (so Job 5:9-10).
maketh small--Rather, "He draweth (up) to Him, He attracts (from the earth below) the drops of water; they (the drops of water) pour down rain, (which is) His vapor." "Vapor" is in apposition with "rain," marking the way in which rain is formed; namely, from the vapor drawn up by God into the air and then condensed into drops, which fall (Psalm 147:8). The suspension of such a mass of water, and its descent not in a deluge, but in drops of vapory rain, are the marvel. The selection of this particular illustration of God's greatness forms a fit prelude to the storm in which God appears (Job 40:1).

For - Having affirmed that God's works are incomprehensibly great and glorious, he now proves it from the most common works of nature and providence. And hence he leaves it to Job to consider how much more deep and inconceivable the secret counsels of God must be. Water - He orders matters so wisely, that the waters which are in the clouds, do not fall down at once in spouts, which would be pernicious to the earth and to mankind; but by degrees, and in drops. According - According to the proportion of vapours which the heat of the sun hath drawn up by the earth or sea. So it notes that great work of God by which the rain is first made of vapours, and afterwards resolved into vapours, or into the matter of succeeding vapours, by a constant rotation.