This psalm purports, in the title, to be a "Prayer of the afflicted, when he is overwhelmed, and poureth out his complaint before the Lord." It is a prayer, made up of earnest supplications, as of one who was in great affliction, whether he refers to his own individual sorrows, or whether he speaks as one of the people. The word "afflicted," means here a suffering one; one who is in trouble. The word is in the singular number, and is one which is often applied to a person who is in trouble - whatever may be the nature of that trouble. The word rendered "overwhelmed" means properly to cover as with a garment; to clothe; and then, to be covered with darkness, affliction, grief, Psalm 61:2. This is the meaning here. It denotes a state where the soul was enshrouded in gloom and sorrow. The word rendered "complaint," means properly meditation; then, moaning; then, the expression of sorrow. It does not necessarily mean, as the word does with us, "finding fault," or expressing dissatisfaction, but it rather denotes that deep sorrow which finds utterance in low and plaintive sounds; not in boisterous and loud outcry, but in subdued notes - in sounds uttered not because one wishes to complain, but because the sorrow is such that it will find vent. Compare 1-Samuel 1:16; 1-Kings 18:27; Job 7:13; Job 9:27; Job 10:1; Job 21:4; Psalm 55:2; Psalm 64:1 (Hebrew).
On what occasion, or by whom, this psalm was composed, it is not possible now to ascertain. Hengstenberg and Prof. Alexander suppose that it was by David. It seems more probable, however, from Psalm 102:13-21, that it was in the time of the captivity, and was in view of the troubles of that long and weary exile, and that the psalmist speaks not of individual and personal troubles, but speaks as one of the people - as one in exile with others who had been long held in captivity, and who sighed for deliverance, and for a restoration to their native land. In the midst of these troubles, which are so tenderly described in the first eleven verses, he saw encouraging evidences that the Lord was about to manifest his mercy, and to restore the people to their native land; and he pleads most earnestly with God, on the ground that he was faithful and unchanging, that he would thus interpose and accomplish the earnest desire of his afflicted people. The "language," indeed, in the psalm, is that of an individual, and the author of the psalm speaks of his own personal sorrows, but it may be as one among many who were equally crushed and overwhelmed, so that the language used to represent his sorrow may describe the sorrows experienced by others in the same circumstances. Beyond all question, the language used in the psalm would express the feelings of many a pious Hebrew in the time of the exile, the sorrow - the sadness - the cherished hopes - the prayers - of many a one in that prolonged and painful captivity.
The psalm may be divided into three parts:
I. A description of the sorrows of the author of the psalm, as representative of the condition and feelings of the exiles, Psalm 102:1-11. In this, the language of lamentation and complaint predominates.
II. The grounds of hope - the indications of deliverance - the evidences that God was about to show favor to his people, and to restore them to their own country - that the time, the set time, to favor Zion was about to come, Psalm 102:12-22.
III. The confidence of the psalmist in God, on the ground of his unchangeableness: on the fact that God is always the same; that his promises must be sure; that his purposes must be accomplished; that the very heavens and the earth would change - that the skies would grow old like a garment and pass away - but that God did not, would not change. All that he had spoken must be true; all that he had purposed must be accomplished; all that he had promised must come to pass, Psalm 102:23-28.

The complaint and miserable state of the poor captives, Psalm 102:1-11; the expectation of deliverance, Psalm 102:12-14; the conversion of the heathen, Psalm 102:15-18; the termination of the captivity, Psalm 102:19-22; the great frailty of man, Psalm 102:23, Psalm 102:24; the unchangeableness of God, Psalm 102:25-27; the permanence of the Church, Psalm 102:28.
The Hebrew, and nearly all the Versions, give the following title to this Psalm: A prayer of the afflicted, when he is overwhelmed, and pours out his sighing before the Lord. There seems to be little doubt that this is the prayer of the captives in Babylon, when, towards the end of the captivity, they were almost worn out with oppression, cruelty, and distress. The Psalm has been attributed to Daniel, to Jeremiah, to Nehemiah, or to some of the other prophets who flourished during the time of the captivity. The author of the Epistle to the Hebrews has applied the twenty-fifth, twenty sixth, and twenty seventh verses to our Lord, and the perpetuity of his kingdom.

INTRODUCTION TO PSALM 102
A prayer of the afflicted, when he is overwhelmed, and poureth out his complaint before the Lord; Whether this psalm was written by David, under a prophetic spirit, concerning future times; or whether by one of the Babylonish captivity, as Daniel, Nehemiah, Ezra, or any other; either just at the close of it, or upon their return from it; since it is said that "the set time to favour Zion was come", is not certain: however, since Zion was a type of the Gospel church, it may be very well applied to Gospel times; and the rather, since some passages in it are cited by the apostle in Hebrews 1:10 as to be understood of Christ: see Psalm 102:25. The Syriac version calls it,
"a prophecy concerning the new people, namely, the Gentiles in the faith:''
it is entitled, "a prayer of the afflicted", or "poor" (e); which Austin understood of Christ, who became poor for our sakes, and was afflicted of God and men. Aben Ezra, Jarchi, and Kimchi, interpret it of the Jews suffering affliction in the Babylonish captivity; the former observes, that it was the opinion of some of their interpreters that this prayer was composed by some wise and understanding man that fell into the hand of his enemies. It may very well be applied to any afflicted person; all the people of God are more or less a poor and afflicted people; outwardly afflicted in body, in estate, and in their good name and character; inwardly with the corruptions of their own hearts, the temptations of Satan, and divine desertions; when it is a very proper time for prayer, James 5:13, and it is their privilege that they have a God of grace and mercy to pray unto, a throne of grace to come to at all times, a spirit of grace and supplication to assist them, and Christ their Advocate and High Priest, to present their petitions for them: and this everyone may do, "when he is overwhelmed"; pressed with the burden of sin, without a view of pardon, covered, as the word (f) signifies, with shame and sorrow for it; almost overset with, and ready to faint and sink under, afflictions, which like waves and billows roll over him; and at the same time is attended with much darkness and unbelieving frames of soul: "and poureth out his complaint before the Lord"; concerning his trials and afflictions, especially concerning the badness and haughtiness of his heart, the hardness of it, being so unaffected with providences, and under the word, and at the ordinances; concerning his leanness, barrenness, and unfruitfulness under the means of grace; his lukewarmness and indifference, his deadness and dulness in duty; his unbelief, distrust, and dejection of mind; as well as of the low estate of Zion, the little success of the Gospel, the few instances of conversion, and the unbecoming walk of many professors. Such a "complaint" as this, or "meditation" (g), which he has thought of and digested in his mind; or all that is in his heart, as Aben Ezra observes, "he pours out" which denotes enlargement in prayer, the abundance of his heart, out of which his mouth speaketh; the fulness of his petition, as also freedom of expression it signifies a a telling all one's mind, speaking out with great liberty; laying it in an humble manner before the Lord, before whom all things are naked and open, and leaving it with him, in entire submission and resignation to his will, to do as seems good in his sight.

(Psalm 102:1-11) A sorrowful complaint of great afflictions.
(Psalm 102:12-22) Encouragement by expecting the performances of God's promises to his church.
(Psalm 102:23-28) The unchangeableness of God.

Prayer of a Patient Sufferer for Himself and for the Jerusalem That Lies in Ruins
Psalm 101:1-8 utters the sigh: When wilt Thou come to me? and Ps 102 with the inscription: Prayer for an afflicted one when he pineth away and poureth forth his complaint before Jahve, prays, Let my prayer come unto Thee. It is to be taken, too, just as personally as it sounds, and the person is not to be construed into a nation. The song of the עני is, however, certainly a national song; the poet is a servant of Jahve, who shares the calamity that has befallen Jerusalem and its homeless people, both in outward circumstances and in the very depth of his soul. עטף signifies to pine away, languish, as in Psalm 61:3, Isaiah 57:16; and שׁפך שׂיחו to pour out one's thoughts and complaints, one's anxious care, as in Psalm 142:3, cf. 1-Samuel 1:15.
As in the case already with many of the preceding Psalm, the deutero-Isaianic impression accompanies us in connection with this Psalm also, even to the end; and the further we get in it the more marked does the echo of its prophetical prototype become. The poet also allies himself with earlier Psalm, such as Ps 22, Ps 69, and Psalm 79:1-13, although himself capable of lofty poetic flight, in return for which he makes us feel the absence of any safely progressive unfolding of the thoughts.