Chapter 3 — Part I: The Creed — Article I: I Believe in God, the Father Almighty, Creator of Heaven and Earth
Section 27. Practical Admonitions Concerning The Mystery Of The Trinity — Since nowhere is a too curious inquiry more dangerous, or error more fatal, than in the knowledge and exposition of this, the most profound and difficult of mysteries, let the pastor teach that the terms nature and person used to express this mystery should be most scrupulously retained; and let the faithful know that unity belongs to essence, and distinction to persons.