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>> “Well...if you’re a Christian you’ll be surprised then when it occurs.” <<
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Shouldn’t be!
Paul promised the Thessalonians that because they kept his appointed times, they would not be surprised.
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If they do not believe there is a taking away of believers in the rapture... and are indeed Christians... they certainly will be surprised when it occurs.
There is no “Rapture”.
The concept denies the Second Coming of Christ, by injecting a prior judgment.