Jesus used an ancient Galilean wedding to describe what the rapture will be like. After the bride accepts the bridegroom's offer, they both wait and prepare, until the bridegroom's father says "it time to unite and marry". When the bride hears the trumpet call, she knows the bridegroom is coming to get her. In the same way, when we, as born again Christians, hear the trumpet call, we know Jesus is coming back to take us to be with him forever.