Trinity Sunday: The very first Anglican "Article of Religion"

I. Of Faith in the Holy Trinity.

There is but one living and true God, everlasting, without body, parts, or passions; of infinite power, wisdom, and goodness; the Maker, and Preserver of all things both visible and invisible. And in unity of this Godhead there be three Persons, of one substance, power, and eternity; the Father, the Son, and the Holy Ghost.

Although originally stated in the Church of England, the Thirty-nine Articles were "established" in the Episcopal Church, USA, by its General Convention in 1801.