I always wonder about the charge of Protestants truncating the RCC Canon, when the 27 books we accept as the NT came from Athanasius and Origen,....but I guess they also were dispensational pastors and not really Catholics. Real Catholics would never claim any other earlier Catholic actually listed those 27 books as their canon. /s ;^)
The books we keep are the ones that self affirm as a unit.
The ones we do not are clearly antichrist. Athanasius and Origen had a love for gnosticism and Nico Laitanism