My church leader has said in the past; speaking about the Rapture, if you are in the nightclub when Jesus comes, He’s not going to stop by there to pick you up. I don’t go to nightclubs but, is this doctrine true of the Rapture?
Your pastor was using the nightclub as an example to imply that if you are sinning at the time of the rapture you will be left behind. If he is right the only way to be certain that won’t happen is to never sin again because no one knows exactly when the rapture will take place.
Since it is impossible for believers to completely stop sinning, I imagine there will be many who will be committing some kind of sin at the very moment the rapture happens. But that’s why inclusion in the rapture is based on what we believe, not on how we behave.
The Lord forgave all our sins at the cross (Colossians 2:13-14). He saved us at the moment we believed and gave us the seal of the Holy Spirit as a deposit to guarantee our inheritance (Ephes. 1:13-14). From that time on He no longer counts our sins against us (Romans 7:18-20). He did all this because He wanted to make sure none of us will be left behind.
“For the Lord himself will come down from heaven, with a loud command, with the voice of the archangel and with the trumpet call of God, and the dead in Christ will rise first. After that, we who are still alive and are left will be caught up together with them in the clouds to meet the Lord in the air. And so we will be with the Lord forever” (1 Thes. 4:16-17).