Baptism

Go, therefore, and make disciples of all nations, baptizing them in the name of the Father, and of the Son, and of the Holy Spirit, teaching them to observe all that I have commanded you.

Matthew 28:19-20a

Holy Baptism is the basis of the whole Christian life, the gateway to life in the Spirit, and the door which gives access to the other sacraments. Through baptism we are freed from sin and reborn as sons and daughters of God; we become members of Christ, are incorporated into the Church and made sharers in her mission.

Catechism of the Catholic Church