The First Principle establishes the first boundary of Holy Scripture as the supreme or primary authority of the Church's faith and practice. Every practice and principle at operation in the Church must be subject to the test of whether it can be either proved by Holy Scripture or else not be contrary to what Holy Scripture teaches.

The second boundary of the Reformed Episcopal Church is that of the Apostles' Creed. The First Principal appeals to the Apostle's Creed, thus making our Church creedal. Bishop Cheney explains:"If I build my house, I will consult an architect. The architect will present me the latest style, the most modern ideas. But our Church has done exactly the opposite and presented the earliest of ideas. Why? Because the water very near the fountain head is the purest. We call it the Apostles' Creed. There is an old legend that each Article was suggested by one of the Apostles. The legend is false, but the substance of the Articles does date back so near to the time of the Apostles that it represents clear the Apostles' doctrine. I do not believe a thing is better simply because it is old. But in Christianity, the nearer I get to Christ's own day, the more assured I can be." 6

In claiming to be creedal, the Reformed Episcopal Church submits herself to the wisdom of the entire Church, refusing to believe that she and she alone can learn and express the truth. It has been charged that since the Reformed Episcopal Church does not affirm the Nicene Creed in her Declaration, she omits it as an authority. This is not true. The Nicene Creed finds its source in the affirmations of the Apostles' Creed and thus it also becomes a secondary authority to Holy Scripture.

The third boundary is the Christian Sacraments. "The Divine institution of Baptism and the Lord's Supper" These two Gospel Sacraments are the organs of Christ's Body, the outward visible means through which He communicates His presence and power to us. It is a testimony to the belief of this Church in the living presence of Christ in His Church.

The fourth boundary contained in Principle 1 is "The Doctrines of Grace substantially as they are set forth in the Thirty-Nine Articles of Religion".The founders of the Reformed Episcopal Church are quick to link themselves with the teaching of the early English Reformers. The essence of their teaching is found in the Thirty-Nine Articles of Religion. At the Fifth General Council, held in 1887, the Rev. Mason Gallagher proclaimed:

In discussing this question, as far as time will permit, I will examine a few salient points of the doctrine of the Reformers; will endeavor to show wherein the Reformed Episcopal Church agrees with these founders of the Church of England, and wherein, at the same time, the Protestant Episcopal Church has departed from the doctrine of these same Reformers. If it can be proved that we of this Church here represented in Council have, in our work, simply restored the 'old paths' of the Fathers- our right to exist, our duty to have done this work is thereby fully and forever established; settled as decisively as the right and duty of Cranmer, Latimer, and Ridley, three centuries ago, to separate from the Church of Rome. 7

Clearly the Fourth boundary of the Reformed Episcopal Church links her to the doctrine and practice of the Reformational English Church