The Rise and Triumph of the Modern Self by Carl Trueman
Calvin had studied Plato - no friend to Christianity - and is amused how accurately he depicted (in the Republic) the antics of medieval priests in celebrating the Mass - preying on the innocent and uneducated by fooling them into believing nonsense through magical "hocus pocus" conjuring tricks with bread and wine.
Private Communion (or Masses): Calvin is against them. True, he is against the Mass "period"; but mutatis mutandis he is against private celebrations of the Lord's Supper for the same reason: the Supper is meant to define the communion of the body, not its separation and individuality. As for the Mass itself: Calvin is subject to the antics of historic revisionists as much as we are in our time.
You can read the text of his prayer below:
Onesimos Nesib, Aster Ganno, and the Oromo Translating Team
Onesimos Nesib’s Conversion
Pauline Fathme, Christian Rufo and the Early Missions to the Oromo