The views of the “Holy Fathers” are informative to Orthodoxy?
They being who, “Tertullian, John of Damascus, etc.?
They being who, Tertullian, John of Damascus, etc.?"
Yes, the writings of The Fathers will tell you quite a bit about Orthodoxy but you must understand two things about the Fathers, first, none of them are infallible, they all can err, some more than others and second, what you want to look for is the consensus among them. Now, +John of Damascus is certainly one of those we call a " Holy and God bearing Father". Tertullian, on the other hand, is considered something of a father in the West, I suppose. We remember him for his heresy.