Luther on Baptism (4)
Baptism is an eternal covenant which should remind us of God's grace and mercy.
Baptism is an eternal covenant which should remind us of God's grace and mercy. To be baptized again is unnecessary. Indeed, it is a grievous sin. For to allow oneself to be baptized again amounts to charging God that He does not want to keep what He had once promised us...Whenever your heart wants to grow timid and fearful because of sins, call to mind the covenant which God has made with you in Baptism at the beginning of your life and cling to the Word and sacred Sacrament whereby God has certified this covenant to you so that you are not to doubt the promise of the forgiveness of sins. (What Luther Says, p. 59, para 159)