then a young man, heard him preach.

In this view, Hippolytus accused Pope Zephyrinus of modalism, the heresy which held that the names Father and Son are simply different names for the same subject. Hippolytus championed the Logos doctrine of the Greek apologists, most notably Justin Martyr, which distinguished the Father from the Logos ("Word"). An ethical conservative, he was scandalized when Pope Callixtus I