Original Catholic Doctrine: Creed, Liturgy, Baptism, Passover

The Didascalia Apostolorum claims it "is the Catholic doctrine of the twelve Apostles and the holy disciples of our Lord." Is that 3rd century document claim true? Where should original Catholic Christian doctrine come from? Was the Nicene Creed the original 'Apostles' Creed'? What about the old Roman Form from Rufinus or the 'Creed of Lucian'? Who used the term 'Catholic Church of God'? Did the murderous Emperor Theodosius enforce a changed creed? What were early church services like? What do we learn from the 'Life of Polycarp' and Melito? What was the original liturgy? What is a 'synaxis'? Was it on Saturday? Was baptism by immersion? Were only adults baptized by early Christians? Did Irenaeus object that Valentinian heretics mixed oil and water? Did Polycarp live to 86 or 104? Did early Christians baptize infants? What about Jesus' blessing of little children? When was the original Passover/Eucharist? Was it to be observed annually or more often according to Emperor Constantine and the Quartodecimens? If Pascha was at night, should it not still be observed then on the 14th of Nisan/Abib? When did the Apostle John, Apostle Philip, Polycarp, Thraseas, Sagaris, Papirius, Polycrates, Apollinaris, and Apollonius keep Passover? What about Easter and the Ishtar/Eostre? What should those wishing to be faithful rely on? Dr. Thiel addresses these matters and more in this sermon.
A free online book of related interest is available titled "Beliefs of the Original Catholic Church" URL: www.cogwriter....