"In my Father's house are many mansions: if it were not so, I would have told you. I go to prepare a place for you. And if I go and prepare a place for you, I will come again, and receive you unto myself; that where I am, there ye may be also." (John 14:2-3)
The world has not seen the last of Jesus Christ! He was in the world once, but the world would not have Him, even though He had created it (John 1:10). While He was on earth, He made it clear that He would be returning some day to judge the world.
But here in the upper room, just before His arrest and crucifixion, He told His disciples, for the very first time, that He would be coming for them personally, not to judge them with the world, but to "receive you unto myself." In the first epistle written by the apostle Paul, this wonderful promise was repeated and amplified: "For the Lord himself shall descend from heaven. . . . and the dead in Christ shall rise first: Then we which are alive and remain shall be caught up together with them in the clouds, to meet the Lord in the air: and so shall we ever be with the Lord" (1 Thessalonians 4:16-17).
When He comes again, we shall be where He is, forever! In the meantime, the "dead in Christ" are already with Him. At that time, "we shall all be changed, In a moment, in the twinkling of an eye. . . . For this corruptible must put on incorruption, and this mortal must put on immortality" (1 Corinthians 15:51-53).
During this present time, He is preparing a place for us in the New Jerusalem which, like Christ Himself, will be "coming down from God out of heaven" (Revelation 21:2). All of this is exactly what we might expect from such a gracious and loving Savior, and He assures us that "if it were not so, I would have told you." HMM