In the eastern rite the priest approaches the Altar  of Sacrifice with the words, "Now is the time for God to act."   These  words remind the faithful that in the Liturgy the substance of bread and  wine is changed by the action of the Spirit into the Body and Blood of  Jesus Christ and that, as we receive the Energy of the Triune God in the  Mystery of the Blessed Sacrament, it is the Sanctifier who acts to  change our very being, restoring in us the Image of that which we  receive.