Trinitarian Profession from the Athanasian Creed (Quicunque Vult)

Now the Catholic Faith is this: that we worship One God in Trinity, and Trinity in Unity; neither confounding the Persons, nor dividing the Substance. For there is one Person of the Father, another of the Son, and another of the Holy Ghost. But the Godhead of the Father, of the Son, and of the Holy Ghost is all One, the Glory Equal, the Majesty Co-Eternal.