Jehovah upholding all the falling. He gives instances of the goodness and mercy of God, such as make it evident that God reigns only for the promotion of the general welfare of mankind. By the falling, and those who are bowed down, he means figuratively those who are overwhelmed by adversity, and would sink at once, were not God to extend his hand for their support. God, in short, has respect to the troubles of men, and helps such as are in distress, so that all ought not only to look upon his divine government with reverence, but willingly and cordially submit themselves to it. Another lesson taught us is, that none will be disappointed who seeks comfort from God in his affliction.

The Lord upholdeth all that fall - The word used here is a participle, literally, "The Lord sustaining;" that is, the Lord is a Sustainer or Upholder of all that fall. The allusion is to those who have no power to go of themselves; who would sink under the burdens of life if they were not supported. The idea is, that it is a characteristic of the Lord, that he does sustain such; that all such may confidently look to him to uphold them.
And raiseth up all those that be bowed down - The word here also is a participle: "he is lifting up;" that is, he is a lifter up. The reference is to those who are bent and bowed under the duties, the cares, the trials of life; who go bowed down under those burdens. God is able to strengthen them so that they can bear those burdens without being crushed under them.

The Lord upholdeth all that fall - נפלים nophelim, the falling, or those who are not able to keep their feet; the weak. He shores them up; he is their prop. No man falls through his own weakness merely; if he rely on God, the strongest foe cannot shake him.

The LORD upholdeth all that (h) fall, and raiseth up all [those that be] bowed down.
(h) Who being in misery and affliction would faint and fall away if God did not uphold them, and therefore they should revere him who reigns in heaven and suffer themselves to be governed by him.

The Lord upholdeth all that fall,.... Not all that fell in Adam, as all mankind did; nor all that fall into sin, as every man does; and therefore not those that fall into hell: but this is to be understood of the subjects of Christ's kingdom, of which the psalmist is speaking; who does that which no mortal king can do, as Aben Ezra observes: another king raises up one, and depresses another; supports one, and lets another fall: but the Lord upholds all his people and subjects with the right hand of his righteousness; though they are liable to fall into sin, and in many instances do fall, and into various temptations and afflictions; yet he sustains and upholds them, that they shall not fall finally and totally by sin, nor be overwhelmed and crushed by their heavy afflictions. Or, "all that are falling" (g); he either upholds and keeps them that they shall not fall, at least so as to perish; or he holds them by his right hand when they are fallen, and raises them up again; and bears them up under all their exercises, so that they are not utterly cast down and destroyed, Psalm 37:24;
and raiseth up all those that be bowed down: with a body of sin, under which they groan, being burdened, and which presses them sore; with Satan's temptations, like the woman in the Gospel, bound together by him; and with various troubles and afflictions; but the Lord raises and bears them up under all, and comforts and refreshes them.
(g) "emnes cadentes", Pagninus, Montanus, Junius & Tremellius, Piscator, &c.

(Compare Psalm 37:17; Psalm 54:4).

The poet now celebrates in detail the deeds of the gracious King. The words with ל are pure datives, cf. the accusative expression in Psalm 146:8. He in person is the support which holds fast the falling ones (נופלים, here not the fallen ones, see Psalm 28:1) in the midst of falling (Nicephorus: τοὺς καταπεσεῖν μέλλοντας ἑδραιοῖ, ὥστε μὴ καταπεσεῖν), and the stay by which those who are bowed together raise themselves. He is the Provider for all beings, the Father of the house, to whom in the great house of the world the eyes (עיני with the second ê toneless, Ew. 100, b) of all beings, endowed with reason and irrational, are directed with calm confidence (Matthew 6:26), and who gives them their food in its, i.e., in due season. The language of Psalm 104:27 is very similar, and it proceeds here, too, as there in Psalm 104:28 (cf. Sir. 40:14). He opens His hand, which is ever full, much as a man who feeds the doves in his court does, and gives רצון, pleasure, i.e., that which is good, which is the fulfilling of their desire, in sufficient fulness to all living things (and therefore those in need of support for the body and the life). Thus it is to be interpreted, according to Deuteronomy 33:23 (after which here in the lxx the reading varies between εὐδοκίας and εὐλογίας), cf. Acts 14:17, ἐμπιπλών τροφῆς καὶ εὐφροσύνης τάς καρδίας ἡμῶν. השׂבּיע is construed with a dative and accusative of the object instead of with two accusatives of the object (Ges. 139. 1, 2). The usage of the language is unacquainted with רצון as an adverb in the sense of "willingly" (Hitzig), which would rather be ברצונך. In all the ways that Jahve takes in His historical rule He is "righteous," i.e., He keeps strictly to the rule (norm) of His holy love; and in all His works which He accomplishes in the course of history He is merciful (חסיד), i.e., He practises mercy (חסד, see Psalm 12:2); for during the present time of mercy the primary essence of His active manifestation is free preventing mercy, condescending love. True, He remains at a distance from the hypocrites, just as their heart remains far from Him (Isaiah 29:13); but as for the rest, with impartial equality He is nigh (קרוב as in Psalm 34:19) to all who call upon Him בּאמת, in firmness, certainty, truth, i.e., so that the prayer comes from their heart and is holy fervour (cf. Isaiah 10:20; Isaiah 48:1). What is meant is true and real prayer in opposition to the νεκρὸν ἔργον, as is also meant in the main in John 4:23. To such true praying ones Jahve is present, viz., in mercy (for in respect of His power He is everywhere); He makes the desire of those who fear Him a reality, their will being also His; and He grants them the salvation (σωτηρία) prayed for. Those who are called in Psalm 145:19 those who fear Him, are called in Psalm 145:20 those who love Him. Fear and love of God belong inseparably together; for fear without love is an unfree, servile disposition, and love without fear, bold-faced familiarity: the one dishonours the all-gracious One, and the other the all-exalted One. But all who love and fear Him He preserves, and on the other hand exterminates all wanton sinners. Having reached the Tav, the hymn of praise, which has traversed all the elements of the language, is at an end. The poet does not, however, close without saying that praising God shall be his everlasting employment (פּי ידבּר with Olewejored, the Mahpach or rather Jethib sign of which above represents the Makkeph), and without wishing that all flesh, i.e., all men, who αρε σὰρξ καὶ αἷμα, בּשׂר ודם, may bless God's holy Name to all eternity. The realization of this wish is the final goal of history. It will then have reached Deuteronomy 32:43 of the great song in Deut. 32 - Jahve one and His Name one (Zac 14:9), Israel praising God ὑπὲρ ἀληθείας, and the Gentiles ὑπὲρ ἐλέους (Romans 15:8.).