Key Points: John the Baptist is the New Testament fulfillment of Old Testament prophets Isaiah ( quotation), and Elijah (attire). For Jews even today, Elijah is awaited to show them their Messiah. There IS a Hell! The Trinity is implicit in scripture, but not explicit. We needed the Church, guided by the Holy Spirit, to define the relationships in the Trinity. (See Session 1 about why the Catholic Church has that unique authority.)