After his resurrection Christ gives this mission to his apostles which is represented now by Deacons, Priests & Bishops. "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 28:19-20).
What I have presented here is a short essay of the Sacrament of Baptism. The responsibility to discover more is within us.