To them it is a brand new beginning, what ever happened in the past has now been forgiven and you have been given a fresh clean start. For a little while you are totally clean and sinless. You now belong to the church, the family of God.
Anyone that leaves the Amish and allows themselves to become baptized again has no hope, and will also never be accepted back into the Amish church. We knew there would be no turning back even if we ever wanted to, (we never have) on the day we confirmed our faith in Jesus by being baptized again, nearly two years after we had left. It was one of the happiest days of our life!