Jamieson, Fausset and Brown on Mark 13:29

29. So ye, in like manner, when ye shall see these things come to pass--rather, "coming to pass."

know that it--"the kingdom of God" (Lu 21:31).

is nigh, even at the doors--that is, the full manifestation of it; for till then it admitted of no full development. In Luke (Lu 21:28) the following words precede these: "And when these things begin to come to pass, then look up, and lift up your heads; for your redemption draweth nigh"--their redemption, in the first instance certainly, from Jewish oppression (1Th 2:14-16; Lu 11:52): but in the highest sense of these words, redemption from all the oppressions and miseries of the present state at the second appearing of the Lord Jesus.