Isaiah 49:4

“Then I said, &c.] The Messiah said, by way of objection, in a view of what treatment he should meet with, or when entered on his work, and which he found by experience, what follows: I have laboured in vain; this is not to be understood of the travail of his soul, or of his sufferings and death, which were not in vain, but issued in the redemption and salvation of his people; but of his ministry and miracles, and fatiguing journeys among the Jews; which, with respect to them, were in vain, as to their conversion and reformation; they rejecting the Messiah, slighting his doctrines and miracles, refusing to be gathered by him, being a faithless and perverse generation: I have spent my strength…”

“I--Messiah. in vain--comparatively in the case of the greater number of His own countrymen. "He came unto His own, and His own received Him not" (Isa 53:1-3; Luk 19:14; Joh 1:11; Joh 7:5). Only a hundred twenty disciples met after His personal ministry was ended (Act 1:15). yet . . . my judgment . . . with the Lord--Ultimately, God will do justice to My cause, and reward (Margin for "work," compare Isa 40:10; Isa 62:11) My labors and sufferings. He was never "discouraged" (Isa 42:4; Isa 50:7, Isa 50:10). He calmly, in spite of seeming ill success for the time, left the result with God, confident of final triumph (Isa 53:10-12; Pe1 2:23). So the ministers of Christ (Co1 4:1-5; Pe1 4:19).”

“Then I said - I the Messiah. In the previous verses he speaks of his appointment to the office of Messiah, and of his dignity. The design here is to prepare the way for the announcement of the fact that he would make known his gospel to the pagan, and would be for a light to the Gentiles. For this purpose he speaks of his labors among his own countrymen; he laments the little success which attended his work at the commencement, but consoles himself with the reflection that his cause was with God, and that his labors would not go unrewarded. I have labored in vain - This is to be regarded as the language of the Messiah when his ministry would be attended with comparatively little success; and…”

“Then said I - Lord, thou sayest thou wilt be glorified by my ministry; but I find it otherwise. In vain - Without any considerable fruit of my word and works among the Israelites. My judgment - My right, the reward which by his promise, and my purchase, is my right. Isaiah 49:5”

“49:4 my work seems so useless . . . to no purpose: Even though people stubbornly refuse his message, the servant would reach out to them. • I will trust God: Despite discouragement and suffering, the servant would continue to discharge his duty faithfully, trusting God for the outcome. God promised to reward the servant’s faithfulness (see also 40:10; 50:8).”

“I have laboured: Isa 65:2; Eze 3:19; Mat 17:17, Mat 23:37; Joh 1:11; Rom 10:21; Gal 4:11 spent: Lev 26:20; Co2 12:15 yet: Isa 53:10-12; Psa 22:22-31; Luk 24:26; Joh 17:4, Joh 17:5; Co2 2:15; Phi 2:9, Phi 2:10; Heb 12:2 work: or, reward, Isa 40:10, Isa 62:11 Isaiah 49:5”

“In the next v. the speaker meets the words of divine calling and promise with a complaint, which immediately silences itself, however. "And I, I said, I have wearied myself in vain, and thrown away my strength for nothing and to no purpose; yet my right is with Jehovah, and my reward with my God." The Vav with which the v. opens introduces the apparent discrepancy between the calling he had received, and the apparent failure of his work. אכן, however, denotes the conclusion which might be drawn from this, that there was neither reality nor truth in his call. The relation between the clauses is exactly the same as that in Psa 31:23 and Jon 2:5 (where we find אך, which is more rarely used in…”