Lancelot Andrewes, the great Anglican bishop and the primary translator of the King James Bible, defines the parameters of our Christian faith this way:
One canon reduced to writing by God himself, two testaments, three creeds, four general councils, five centuries, and the series of Fathers in that period – the centuries that is, before Constantine, and two after, determine the boundary of our faith.
We are a people of one book, the Bible, who recognize the power of the Holy Spirit within his Church, especially within the three great creeds (Nicaean, Apostle’s, and Athanasian), the first four councils of the unified Church, and the much respected writings of the early Church Fathers. Thus, we hold to what unites all Christians, one with another: one Lord, one faith, one baptism.
"In Essentials, Unity; in Non-essentials, Liberty; in All Things, Charity"