Canon of the Mass

(Stand)

P. May the Lord be with you.
S. And with your spirit.
P. Lift up your hearts.
S. We have lifted them up to the Lord.
P. Let us give thanks to the Lord our God.
S. It is right and just.

(Here the Priest says the appropriate Preface. This is the Preface of the Holy Trinity)

P. It is indeed fitting and right, our duty and our salvation, always and everywhere to give thanks to You, Lord, Holy Father, almighty and eternal God, who with Your only-begotten Son and the Holy Spirit are one God, one Lord: Not in the oneness of a single person, but three persons in one single essence. For what we believe from your revelation concerning Your glory, that also we believe of Your Son and of the Holy Spirit without difference or distinction; so that when we affirm the true and everlasting Godhead we worship three distinct persons in a oneness of Being and with equality of majesty. And that God the angels praise with the archangels, cherubim, and seraphs, ceaselessly singing with one voice: