They had a hoolie
series of hoolies ( remember I am er on AB) up to around 350AD
about which were IN and which were OUT.
and Mr Rhymer ( my old english teacher that is!) said that there were doubts about Pauline authorship even then ( they didnt think the old bagga had written them to you and me). But they were still included as the theology was what they wanted. = doctrine was orthodox
orthos - straight - doxa - here teaching opinion NT - glory splendour
Metzger has written a lot about this
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but jesus they are not cheap !
[ If you believe ( Coptic) that jesus was divine in nature before the crucifixion, then the Infancy Gospels are IN. fr'instance. Western Christians dont]