Baptism
"Baptism, the door to life and to the Kingdom, [...] is first and foremost the Sacrament of that faith by which human beings, enlightened by the grace of the Holy Spirit, respond to the Gospel of Christ. Furthermore, Baptism is the Sacrament by which human beings are incorporated into the Church and are built up together into a dwelling place of God in the Spirit, and into a royal priesthood and a holy nation; it is also a sacramental bond of unity linking all who ar signed by it."
~ Rite of Baptism, General Introduction (2019)