38 Moreover, Christ is present in His Church in a still more sublime manner as she offers the Sacrifice of the Mass in His name; He is present in her as she administers the sacraments. On the matter of Christ's presence in the offering of the Sacrifice of the Mass, We would like very much to call what St. John Chrysostom, overcome with awe, had to say in such accurate and eloquent words: "I wish to add something that is clearly awe-inspiring, but do not be surprised or upset. What is this? It is the same offering, no matter who offers it, be it Peter or Paul. It is the same one that Christ gave to His disciples and the same one that priests now perform: the latter is in no way inferior to the former, for it is not men who sanctify the latter, but He who sanctified the former. For just as the words which God spoke are the same as those that the priest now pronounces, so too the offering is the same." (38) No one is unaware that the sacraments are the actions of Christ who administers them through men. And so the sacraments are holy in themselves and they pour grace into the soul by the power of Christ, when they touch the body. The Highest Kind of Presence. These various ways in which Christ is present fill the mind with astonishment and offer the Church a mystery for her contemplation. But there is another way in which Christ is present in His Church, a way that surpasses all the others. It is His presence in the Sacrament of the Eucharist, which is, for this reason, "a more consoling source of devotion, a lovelier object of contemplation and holier in what it contains" (39) than all the other sacraments; for it contains Christ Himself and it is "a kind of consummation of the spiritual life, and in a sense the goal of all the sacraments." (40)
Source: Mysterium Fidei (Vatican.va)