O Lord Christ, who at the last supper didst bequeath to thy Church a perpetual memorial of the sacrifice of the cross: Help us in this holy sacrament steadfastly to contemplate thy redeeming love, that we, ever being mindful of the price wherewith thou hast bought us, may yield our lives to thine obedience; who livest and reignest with the Father and the Holy Spirit, one God, world without end.