Luke 18:8

“I tell you that he will avenge them speedily, etc.] As he did in a few years after the death of Christ, when God's elect among the Jews were singled out, and gathered in from them, and were delivered from their persecutors, and saved from temporal ruin and destruction, whilst the Roman army made sad havoc of their enemies; and so will he do in the end of the world. Nevertheless, when the son of man cometh; either to destroy Jerusalem, or to judge the world: shall he find faith on the earth? either in the land of Judea, the believers being removed from thence, and scattered among the Gentiles, and not a man, at least in Jerusalem, that had any faith in Jesus, as the Messiah; or in the world…”

“speedily--as if pained at the long delay, impatient for the destined moment to interpose. (Compare Pro 29:1.) Nevertheless, &c.--that is, Yet ere the Son of man comes to redress the wrongs of His Church, so low will the hope of relief sink, through the length of the delay, that one will be fain to ask, Will He find any faith of a coming avenger left on the earth? From this we learn: (1) That the primary and historical reference of this parable is to the Church in its widowed, desolate, oppressed, defenseless condition during the present absence of her Lord in the heavens; (2) That in these circumstances importunate, persevering prayer for deliverance is the Church's fitting exercise; (3)…”

“Speedily - Suddenly, unexpectedly. He will surely vindicate them, and that at a time, perhaps, when they were nearly ready to give over and to sink into despair. This may refer to the deliverance of the disciples from their approaching trials and persecutions among the Jews; or, in general, to the fact that God will interpose and aid his people. Nevertheless - But. Notwithstanding this. Though this is true that God will avenge his elect, yet will he find his elect “faithful?” The danger is not that “God” will be unfaithful - he will surely be true to his promises; but the danger is that his elect - his afflicted people - will be discouraged; will not persevere in prayer; will not continue to…”

“Yet when the Son of man cometh, will he find faith upon earth - Yet notwithstanding all the instances both of his long suffering and of his justice, whenever he shall remarkably appear, against their enemies in this age or in after ages, how few true believers will be found upon earth! Luke 18:9”

“18:8 when the Son of Man returns: This is an allusion to Dan 7:13-14. • how many will he find on the earth who have faith? The question is whether believers will remain faithful through the trials that will precede the coming of the Son of Man (see Matt 24:10-12; 2 Thes 2:3; 1 Tim 4:1).”

“he will: Psa 46:5, Psa 143:7-9; Pe2 2:3, Pe2 3:8, Pe2 3:9 when: Mat 24:9-13, Mat 24:24; Th1 5:1-3; Heb 10:23-26; Jam 5:1-8 Luke 18:9”