Qualifications of the Early Church Fathers:
First, their antiquity.
holiness of life.
orthodox doctrine. (true doctrine)
ecclesiastical approval.
We thank you Lord for sending us these men who acted as Your stewards for the fledgling Church.
And just think of it. Most of them knew the apostles, knew the Blessed Virgin Mary, knew the disciples — maybe they even were some of the first disciples.
And some people doubt them?