This generation - Ἡ γενεα αὑτη, This very race of men. It is certain that this word has two meanings in the Scriptures; that given in the text, and that above. Generation signifies a period of a certain number of years, sometimes more, sometimes less. In Deuteronomy 1:35; Deuteronomy 2:14, Moses uses the word to point out a term of thirty-eight years, which was precisely the number in the present case; for Jerusalem was destroyed about thirty-eight years after our Lord delivered this prediction. But as there are other events in this chapter, which certainly look beyond the destruction of Jerusalem, and which were to take place before the Jews should cease to be a distinct people, I should therefore prefer the translation given above. See on Matthew 24:34 (note).

Verily I say unto you, that this generation shall not pass,.... Not the generation of men, in general, or Jews in particular, nor of Christians; but that present generation of men, they should not all go off the stage of life,
till all these things be done; which were now predicted by Christ, concerning the destruction of Jerusalem, the signs of it, and what, should immediately follow upon it; See Gill on Matthew 24:34.

Verily I say unto you, that this generation shall not pass fill all these things be done--or "fulfilled" (Matthew 24:34; Luke 21:32). Whether we take this to mean that the whole would be fulfilled within the limits of the generation then current, or, according to a usual way of speaking, that the generation then existing would not pass away without seeing a begun fulfilment of this prediction, the facts entirely correspond. For either the whole was fulfilled in the destruction accomplished by Titus, as many think; or, if we stretch it out, according to others, till the thorough dispersion of the Jews a little later, under Adrian, every requirement of our Lord's words seems to be met.

This generation shall not pass. See notes on Matthew 24:34.

All these things - Relating to the temple and the city.