New Defender's Study Bible Notes
24:36 knoweth no man. Much of the rest of the Olivet discourse is an urgent exhortation always to be ready and watching for Christ’s return, an exhortation that would be contradictory if we first had to watch for the signs of His coming. The initial phase of His coming, therefore, is always imminent.
24:37 days of Noe. In this passage (see also Luke 17:26-27), Jesus confirms the historicity of the universal Flood, as well as the record of Noah and the ark. Hebrews 11:7, and II Peter 2:5 and 3:6 likewise confirm it.
24:38 giving in marriage. “Giving in marriage” could also be understood as “getting out of marriage.” In any case the unconcern of the world just before it was to be destroyed by the Flood will be characteristic of the world just before the coming of the Son of man. Many other characteristics of Noah’s day (immorality, demon possession, widespread corruption and violence, universal rebellion against God and His will) are being repeated in our day.
24:39 so. The coming of the Son of man will be worldwide in extent and effect, as was the Flood, according to Christ.