1 Corinthians 15:51-52
What a glorious day that will be. At the sound of the trumpet, the dead, all those loved ones we have not seen in years, will be raised never to die again. And, we will be changed into our heavenly bodies, those everlasting ones. At that moment, the sounding of the tumpet, we will cross the bridge from earthly life to our eternal heavenly life with our Lord and Savior, Jesus Christ.
Actually, we were changed earlier in our lives in a short time period, also. This is the first bridge we cross when we go from being sinners to being the Righteousness of God, the moment we accept Jesus as Savior. We are told in Romans 10:10 (NLT), "For it is by believing in your heart that you are made right with God, and it is by confessing with your mouth that you have been saved." It doesn't take long to confess Jesus as Lord, maybe longer than the twinkling of an eye, but it's pretty short.
Salvation is instantaneous when we receive Christ, and the translation to our heavenly bodies is instantaneous when we leave this world in any manner. That's a good pair of "suddenlies."
"Listen, I tell you a mystery; we will not all sleep, but we will all be changed--in a flash, in the twinkling of an eye, at the last trumpet. For the trumpet will sound, the dead will be raised imperishable, and we will be changed" (NIV).
Cross the Bridge and Be Changed