Jesus never claimed to be God, but the Son of God. In other words Jesus was only a created being—perhaps the greatest created being—but created nonetheless. This passage reveals that Jesus was not omniscient (He did not know everything) therefore He is different from Yahweh, the true God of the Bible and Christ’s Creator. This verse coupled with verses such as John 5:19 and 14:28 seem to cement the notion that Jesus was, after all, not God incarnate. Was Jesus Christ not God after all? Is the orthodox view of Christianity in jeopardy, having been built on a misunderstanding of Scripture? If you listen to the cults such as the Watchtower the answer is an affirmative YES! Perhaps before this misused verse is warped by anyone’s private interpretation (2nd Peter 1:20; 3:16) we should consider the context in which it was spoken.
Verse 42 is an injunction to watch and be ready, for believers will not know the time of Jesus Christ’s return to this earth for His own. The coming of Christ presently being spoken of is not His return in glory that is both visible and physical; it is His coming down to catch up (Rapture) His saints before the destruction of the Tribulation begins in earnest, similar to the days of Noah when that godly preacher and those with him were spared the judgment of the Flood by being sheltered in the ark. So too Jesus is assuring us that before judgment breaks Christians shall be “taken” because of our faith in Christ.