Holy Trinity

Why did the Christian Church only feel the need to define the Holy Trinity after almost 300 years instead of relying on the one God concept as was fitting with Judaism?

ANSWER PERSON RESPONDS: The Roman Catholic Church developed this doctrine, as it did many others, over a long period of time. As evidenced by the fact that popes still issue doctrine, this process will probably go on and on. As to the specifics of this doctrine, see “Trinity,” Encyclopaedia Britannica Online, October 21, 2003, (access available to the Duke community).