But first must he suffer many things, and be rejected of this generation.

People's New Testament

17:25-30 But first must he suffer many things, etc. See notes on Mt 16:21 24:37-39. Compare Col 3:3-4 2Th 1:7 1Pe 1:7.

Jamieson-Fausset-Brown Bible Commentary

25. But first . suffer, &c.-This shows that the more immediate reference of Lu 17:23 is to an event soon to follow the death of Christ. It was designed to withdraw the attention of "His disciples" from the glare in which His foregoing words had invested the approaching establishment of His kingdom.

Matthew Henry's Concise Commentary

17:20-37 The kingdom of God was among the Jews, or rather within some of them. It was a spiritual kingdom, set up in the heart by the power of Divine grace. Observe how it had been with sinners formerly, and in what state the judgments of God, which they had been warned of, found them. Here is shown what a dreadful surprise this destruction will be to the secure and sensual. Thus shall it be in the day when the Son of man is revealed. When Christ came to destroy the Jewish nation by the Roman armies, that nation was found in such a state of false security as is here spoken of. In like manner, when Jesus Christ shall come to judge the world, sinners will be found altogether regardless; for in like manner the sinners of every age go on securely in their evil ways, and remember not their latter end. But wherever the wicked are, who are marked for eternal ruin, they shall be found by the judgments of God.