1 Thessalonians 4:15
For we say this to you by [the authority of] the word of the Lord [Note: Paul was either quoting what Jesus had previously said, or was giving a revelation he had received from the Lord. See I Cor. 14:37], that we [Christians] who are [still] alive, who are left [on earth] when the Lord returns, will certainly not precede those who have fallen asleep. [Note: The point Paul is making is that the living will not be "changed" (I Cor. 15:51-52) and taken to heaven before the dead are raised].
1 Corinthians 15:51-53
Look, I am telling you a secret truth: We will not all die, but we will all be changed [i.e., physically and spiritually]
Matthew 17:25
He replied, "Yes, [He does]." And when Peter entered the house, Jesus spoke to him first, [i.e., without waiting for Peter to tell Him what he had said to the tax collectors], saying, "What do you think, Simon? From whom do earthly kings collect custom duty and taxes? From their children or from strangers?"
2 Corinthians 4:14
We know that God, who raised up the Lord Jesus [from the dead], will also raise us [apostles] up with Jesus and present us with you people [i.e., in the presence of the Father in heaven].
1 Thessalonians 2:19
For what is [the basis of] our hope, or joy, or crown of honor in the presence of the Lord Jesus when He comes back? [Note: By "crown" Paul alludes to the laurel wreath awarded to the victor in an athletic contest]. Will it not be you people?