ISB ~ Acts 16 v31

Believe in the Lord Jesus:The faith asked of the jailer is a faith that embraces Jesus as Lord and Savior and leads directly to Baptism (16:33; Mk 16:16). The spiritual transformation that takes place in this sacrament (2:38) is immediately evident as the jailer no longer views the missionaries as prisoners but as fellow brothers in need of hospitality, food, and first aid (16:33-34; CCC 1226). See note on Acts 16:15.