BAPTISMAL REGENERATION. One of the effects of Baptism is our birth to the supernatural order (q.v.): "Unless a man be born again of water and the Holy Ghost" (John iii, 5). Baptismal regeneration means that owing to the removal of sin by the sacrament and the infusion of first grace, the subject who has begun to live to nature now begins to live supernaturally. St. Paul speaks of Baptism as "the laver of regeneration" (Titus iii, 5).