"What were the Romish arguments from the days of the Nicene debate down to the postificial anathema?

They were, Truth is one--therefore, true believers cannot differ.
But they DO differ--therefore, there is heresy.
Heresy must be kept out. Make a creed to keep it out; and as to which side IS heresy--heresy is the opinion which is in the MINORITY."

(Beecher, 1846)