An Ancient Prayer for Trinity Sunday

Keep us, O Lord, from the vain strife of words, and grant to us a constant profession of the truth. Preserve us in the faith, true and undefiled, so that we may ever hold fast that which we professed when we were baptized into the name of the Father, and of the Son and of the Holy Spirit; that we may have you for our Father, that we abide in your Son and in the fellowship of the Holy Spirit; through the same Jesus Christ our Lord. Amen.

—Hilary of Poiters