There was a visual sign (the destruction of the Temple) but this also says "the Son of Man in heaven". This is Jesus - in the heavenly realm - seated in the place of power. Look at how Jesus' words are recorded here (can one literally sit at the right hand of God AND come to earth at the same time? The text says nothing about physically coming to earth - that's a presumption you're imposing on the passage):
Mark 14:62 -
Jesus said, “ I Am . And you will see the Son of Man seated in the place of power at God’s right hand and coming on the clouds of heaven.”
The opposite is the truth! The text you quote, and the similar passages below, depict a very vivid picture of the climatic coming of the Lord Jesus Christ at the end, and make absolutely no mention of Titus, the temple destruction or AD70. Sadly, your fixation with Titus and AD70 causes you to miss what Jesus is actually speaking about.
Acts 1:11:
“Which also said, Ye men of Galilee, why stand ye gazing up into heaven? this same Jesus, which is taken up from you into heaven, shall so come in like manner as ye have seen him go into heaven.”
This passage tells us it is the actual “manner” or
tropos (meaning style or mode) of His glorious ascent into heaven is the way He will return.
How did He go?
Literally, physically, visibly.
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Physically: “This same Jesus.”
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Visibly:
“while they beheld, he was taken up” - “as ye have seen Him go.”
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Literally: “In like manner.”
Contrary to Pretrib and Preterist beliefs, the second coming of Christ is not a secret event. Such a mistaken view emanates from a wrong understanding of Scripture. Revelation 1:7 declares:
“Behold, he cometh with clouds; and every eye shall see him, and they also which pierced him: and all kindreds of the earth shall wail because of him” (Revelation 1:7).
Here we see the most public event of all time - the literal, visible, physical return of the Lord Jesus Christ. This passage unmistakably shows that the glorious Second Advent will be the most amazing public event ever. To such an extent that “every eye shall see him.”
The Scriptures talks much about the unexpected nature of the second coming of Christ but nothing of a secret coming. This is clearly an arrival that will shake the world.
Jesus explains in Matthew 24:27:
“For as the lightning cometh out of the east, and shineth even unto the west; so shall also the coming of the Son of man be.”
Christ's coming shall be sudden as lightning. What is more sudden and spectacular than lightning? Lightning is not hid!. It can be seen by all across the sky. This is no secret snatch in this text.
This secret is only in regards the time of His coming, not the reality of it.
Jesus tells us in Matthew 26:64:
“Hereafter shall ye see the Son of man sitting on the right hand of power, and coming in the clouds of heaven.”
This is repeated in Mark 14:62:
“ye shall see the Son of man sitting on the right hand of power, and coming in the clouds of heaven.”
Jesus said in Luke 21:26–27:
“for the powers of heaven shall be shaken. And then shall they see the Son of man coming in a cloud with power and great glory.”
The scriptural references to Christ coming as a “thief in the night” simply refers to the unexpectedness or suddenness of that event and not to its secretiveness.
The only thing secret about the rapture is its date – it is classified. Jesus said in Mark 13:32-33,
“But of that day and that hour knoweth no man, no, not the angels which are in heaven, neither the Son, but the Father. Take ye heed, watch and pray: for ye know not when the time is.”
