I see the confusion here. I did not mean to imply the Church had only the OT prior the NT canon being closed. My point was in the year 325 A.D. there was not a published and bound copy of the NT as we have today. Therefore a Christian trying to refute the Arian heresy would have had a hard time reading thru his/her bible to figure this out.
This is true. Probably one of the reasons that the Arian heresy almost won. However, could a person depend upon the church for the teaching of truth? Aren't there some councils that have some Arian problems? Where would the individual turn to then?