 Paul tells us in Ephesians 1, 13 and 14 that we have the Holy Spirit given to us as a seal, a deposit, a guarantee of our salvation until we acquire the possession of our salvation. That should be awfully encouraging and rewarding. And how is Paul able to make that statement? What he's literally saying is that the Holy Spirit is like our earnest money deposit. It's our guarantee the same way you would put a deposit down on an automobile or a hotel, and you are guaranteed to get that. God does the same thing with the Holy Spirit in us, and he is our guarantee to be with us until we receive our salvation, meaning he's not going to forfeit the Holy Spirit and we're not going to forfeit our salvation.