“Holy Baptism is full initiation by water and the Holy Spirit into Christ’s Body, the Church” (Book of Common Prayer, p. 298).
In the waters of baptism we are reminded that we belong to God and nothing can separate us from the love of God. We also find ourselves part of an extended family, one with Christians throughout the ages and across the world, what we call the “one, holy, catholic [meaning 'universal'], and apostolic Church.”
The Rite of Holy Baptism can be found on pp. 297-308 of the Book of Common Prayer.