The Apology of the Augsburg Confession
Article I God
[1] Our adversaries approve Article I of our Confession, in which we declare that we believe and teach that there is one divine, undivided essence. Yet, there are three distinct persons, of the same divine essence, and coeternal: Father, Son, and Holy Spirit. [2] We have always taught and defended this article. We believe that it has sure and firm testimonies in Holy Scripture that cannot be overthrown. We constantly affirm that those thinking otherwise are outside of Christ’s Church, are idolaters, and insult God.