Baptism is a gift you can’t break

Therefore our Baptism abides forever; and even though some one should fall from it and sin, nevertheless we always have access thereto, that we may again subdue the old man. But we need not again be sprinkled with water; for though we were put under the water a hundred times, it would nevertheless be only one Baptism, although the operation and signification continue and remain. Repentance, therefore, is nothing else than a return and approach to Baptism, that we repeat and practise what we began before, but abandoned.