Before and after, both baptisms forgave people their sins. The church makes disciples of people by baptizing them and by teaching them. Sometimes they baptize before they teach, for example infants, and very often they teach before they baptize. Teaching people to observe all that Jesus commanded means the whole Bible, Law and Gospel. Pastors must be good teachers for men, women and children.
Nothing keeps people with the church as does good preaching and good teaching.
Always prepare carefully. Baptism and teaching reveal the saving Trinity to the sinner. The Father adopts us as His children. The Son becomes our Redeemer. The Holy Spirit becomes our Comforter.