Baptism is an eschatological sacrament

“Baptism is not just the washing away of sins. Such a truncated notion led to the delay of baptism in the fourth century. Baptism is most prominently an eschatological sacrament. It is not only a rite of new creation, new birth, adoption, being made righteous, and so forth. In short, Baptism involves incorporation into the dominion of Christ, actualized eschatology, and anticipation of the completion of salvation. Such a sacrament does not tolerate a delay. It should be administered as soon as possible to reap its benefits.”

Schwarz, Hans. 1988. “Baptism and maturity.” Lutheran Theological Journal 22 (1): 23–31.