Quoting the Decree on the Church's Missionary Activity, Christopher J. Walsh comments that the Second Vatican Council reaffirms the traditional understanding of Christian initiation as a unity and a process: "It is not something achieved with a trickle of water one Sunday afternoon, but a progressive entry into a commitment and a relationship [...] Becoming a Christian is a conversion a growing adherence to Christ in faith and sacrament over an extended period of time" (see also Catechism of the Catholic Church, 1229–31).
