Chapter 16 — Part II: The Sacraments — Baptism
Section 117. This doctrine is taught by the Apostle when he says: One Lord, one faith, one baptism. Again, when exhorting the Romans, that being dead in Christ by Baptism they should take care not to lose the life which they had received from Him, he says: In that Christ died unto sin, he died once. These words seem clearly to signify that as Christ cannot die again, neither can we die again by Baptism. Hence the holy Church also openly professes that she believes one Baptism. That this agrees with the nature of the thing and with reason is understood from the very idea of Baptism, which is a spiritual regeneration. As then, by virtue of the laws of nature, we are generated and born but once, and, as St. Augustine observes, there is no returning to the womb; so, in like manner, there is but one spiritual generation, and Baptism is never at any time to be repeated.