It will take only a second—as quickly as an eye blinks—when the last trumpet sounds. The trumpet will sound, and those who have died will be raised to live forever, and we will all be changed.
This is what you asked the Lord your God to do when you were gathered at Mount Sinai. You said, “Don’t make us listen to the voice of the Lord our God again, and don’t make us look at this terrible fire anymore, or we will die.”
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 those who have died believing in Christ will rise first.
So be careful and do not refuse to listen when God speaks. Others refused to listen to him when he warned them on earth, and they did not escape. So it will be worse for us if we refuse to listen to God who warns us from heaven.