The Bible nowhere teaches a secret coming.

The "mystery" Paul revealed was that we shall
not all sleep, but we shall all be changed
(1 Cor 15:51). Nowhere does he say that noone
will see this event, for it cannot occur until
Christ comes, and He comes quite brightly and
quite noisily, to conquer:

Matt 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.

Rev 1:7
Behold, he cometh with clouds; and every eye
shall see him...

Matt 24:30
They shall see the Son of man coming in the
clouds of heaven with power and great glory.

Rev 19:11
And I saw heaven opened, and behold a white
horse; and he that sat upon him was called
Faithful and True, and in righteousness he
doth judge and make war.

1 Thes 4:16
For the Lord himself shall descend from
heaven with a shout...

Jer 25:30-31
He shall give a shout... for the LORD hath
a controversy with the nations... he will
give them that are wicked to the sword...

Ps 47:5, 8
God is gone up with a shout, the LORD with
the sound of a trumpet... God reigneth over
the heathen: God sitteth upon the throne of
his holiness.

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Heb 9:28
Unto them that look for him shall he appear
the second time without sin unto salvation.

This doesn't require a secret coming of
Christ:

Heb 9:28
Shall he appear [optanomai] the second time...

Rev 1:7
Every eye will see [optanomai] him...

Jesus will appear a second time to all men,
for the salvation of those who are looking
for Him, and for the punishment of those who
are not looking for Him:

2 Thes 1:7-10
The Lord Jesus shall be revealed from heaven
with his mighty angels, In flaming fire taking
vengeance on them that know not God... When he
shall come to be glorified in his saints, and
to be admired in all them that believe...

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The Bible doesn’t teach Jesus will come and go
as fast as the twinkling of a eye. What it says
is that those who are alive at His coming will
be changed into immortal bodies as fast as the
twinkling of an eye (1 Cor 15:51-52), but His
coming will involve much more than that (Rev 19).

Jesus will return the same way he left (Acts 1:11).
He didn't ascend in the twinkling of an eye
(Acts 1:9), nor will he descend like that.

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1 Cor 15:51-52
Behold, I shew you a mystery; We shall not all
sleep, but we shall all be changed, In a moment,
in the twinkling of an eye, at the last trump: for
the trumpet shall sound, and the dead shall be raised
incorruptible, and we shall be changed.

The twinkling of an eye refers only to how quickly
the change of the living will occur at the last trumpet --
the last trumpet itself and the resurrecting (raising)
of the bodies of the dead saints must occur BEFORE
the living are changed, and then the changed must be
gathered up to Christ:

1 Thes 4:16-17
For the Lord himself shall descend from heaven with
a shout, with the voice of the archangel, and with
the trump of God: 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...

Nowhere does it say that this entire sequence of
events occurs in the twinkling of an eye.

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