Hi Lewis,
I agree with you that a Christian can"t lose salvation but the rapture isn't salvation. The rapture is protection of the Bride for a certain time. I think there may be a difference between the Bride and the church. The Bride wants to be intimate with the groom. This is evidenced by building a loser relationship with Him and learning to do His will. There are many Christians who are saved but seem distant, and uninterested in growing in their relationship-very foolish indeed.
YsiC,
Malia