Nor has it remained unknown that the inventors of new dogma have been shewn to be the followers of heretics, and not the walkers in the footsteps of the holy Fathers: therefore whoever wishes to colour any error of his whatever, is condemned by the light of truth, as the Apostle of the Gentiles says, "For everything that doth make manifest is light," for the truth ever remains constant and the same, but falsehood is ever varying, and in its wanderings adopting things mutually contradictory. On this account the inventors of the new dogma have been shewn to have taught things mutually contradictory, because they were not willing to be followers of the Evangelical and Apostolic faith.
Letter of St. Agatho to the Third Council of Constantinople. This is an interesting document of the Faith that is too often overlooked.
