This is symbolized in the liturgy by the catechumens entering the baptistry. See the long and detailed discussions by Franz Josef Dolger, “Der Durchzug durch den Jordan als Sinnbild der christlichen Taufe,” AC 2, 70f; Per Lundberg, La typologie baptismale (Leipzig: A. Lorentz, 1942), pp. 146–166; and Jean Danielou, The Bible and the Liturgy (Notre Dame, IN: Univ. of Notre Dame Press, 1956), pp. 99–113.