Holy and Divine Liturgy. The entire liturgy of the Church finds its center and its highest expression in the celebration of this Sacrament. The Eucharist is the “source and summit of the whole Christian life”. All the Sacraments, like all the ministries of the Church and its apostolic works, are strictly united and ordered to the Holy Eucharist which contains all the spiritual riches of the Church, namely to Christ, our Passover. 31