W
Walking_Home
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The teaching was not held from the time of Christ. Most of that Christological definition didn’t occur until substantially after the early Church period and the definitions of what the Church definitively taught weren’t put into place until the fourth and fifth centuries, starting with the Council of Nicea and after. Creating those definitions was why the councils were called and there was substantial debate involved in those definitions. They weren’t pulled out of thin air but they certainly weren’t concretely defined before that either.
Even after the definitions were created it took a long time for the teaching to be spread through to all the people. Even at the time of the barbarian invasions they were still teaching people the correct definitions.
This is really all off topic though so I’ll stop there. I think we are in agreement on the topic of the OP.
They were not define as far as being put on paper. From what I have read in these forums —a council also defines a teaching (what the Church has held for belief) that has come under attack.