But when they persecute you in this city
Or any city into which they went, and preached the Gospel; and would not suffer them to go on in their work, they were not to desist, but to go elsewhere, where they might hope for a better reception, and a longer continuance, and so of doing more good:
flee ye into another;
not so much for their own safety, though this, according to the circumstances of things, is lawful, but for the further spreading of the Gospel. The exhortation is not to take methods to avoid persecution, or to make an escape from it, but to perseverance under it: the sense is, they were not to be discouraged, and to leave off, because of persecution in one place, but to persist in the ministration of the Gospel, by carrying it to other cities; and it seems to be a spur to them to make haste, and fulfil their office of preaching the Gospel, in the land of Judea: nor need they fear going on too fast, lest they should have no places to preach in;
for verily I say unto you,
this is a certain and indisputable truth not to be called in question, being strongly affirmed by truth itself,
ye shall not have gone over the cities of Israel,
or "finished" them; that is, their tour through them, and their ministry, or the preaching of the Gospel in them,
till the son of man be come;
which is not to be understood of his second coming to judgment, but either of his resurrection from the dead, when he was declared to be the Son of God, and when his glorification began; or of the pouring forth of the Spirit at the day of Pentecost, when his kingdom began more visibly to take place, and he was made, or manifested to be the Lord and Christ; or of his coming to take vengeance on his enemies, that would not have him to rule over them, and the persecutors of his ministers, at the destruction of Jerusalem.