2 Thessalonians 2:2 That ye be not soon
shaken in mind, or be troubled, neither by spirit, nor
by word, nor by letter as from us, as that the day of
Christ is at hand,
Some Christians believe the day of the
Lord is a single day event. They equate the day of the
Lord as Jesus' physical return to earth. But Paul
refutes this thought. Paul told Thessalonians not to
worry, nor troubled as the day of Christ is at hand. The
day of Christ is the day of the Lord, Paul uses Christ
to substitute the Lord here. If the day of the Lord is a
single day event, and is the second coming of Jesus,
Thessalonians should be happy that the day of the Lord
has arrived，that they finally get to meet their Jesus.
But instead, they worry that they are facing the day of
the Lord. So, from Paul's message, we learn that the day
of the Lord is not a single day event，rather, it is the
entire 7 years tribulation which Thessalonians worried
and troubled that they were facing.
Scripture interprets scripture. Here's
another proof by quoting Paul's letter.
Ray