"By the same charity that it enkindles in us, the Eucharist preserves us from future mortal sins. The more we share the life of Christ and progress in his friendship, the more difficult it is to break away from him by mortal sin. The Eucharist is not ordered to the forgiveness of mortal sins - [...]
"The Eucharist is the Sacrament in which our new being is most completely expressed and in which Christ himself unceasingly and in an ever new manner 'bears witness' in the Holy Spirit to our spirit that each of us, as a sharer in the mystery of the Redemption, has access to the fruits of the [...]
"The sin of unbelief, which fundamentally severs a man from the unity of the Church, simply speaking, makes him to be utterly unfit for receiving this sacrament; because it is the sacrament of the Church's unity, as stated above. Hence the unbeliever who receives this sacrament sins more grievously than the believer who is in [...]
"We see still more clearly the reason why the entire sacramental life of the Church and of each Christian reaches its summit and fullness in the Eucharist. For by Christ's will there is in this Sacrament a continual renewing of the mystery of the Sacrifice of himself that Christ offered to the Father on the [...]
"The Eucharist is the most perfect Sacrament of this union. By celebrating and also partaking of the Eucharist we unite ourselves with Christ on earth and in heaven who intercedes for us with the Father but we always do so through the redeeming act of his Sacrifice, through which he has redeemed us, so that [...]
"So, then, this sacrament benefits recipients by way both of sacrament and of sacrifice, because it is offered for all who partake of it… But to others who do not receive it, it is beneficial by way of sacrifice, inasmuch as it is offered for their salvation… And our Lord expressed both ways, saying (Mat. [...]
"The Eucharist is the centre and summit of the whole of sacramental life, through which each Christian receives the saving power of the Redemption, beginning with the mystery of Baptism, in which we are buried into the death of Christ, in order to become sharers in his Resurrection, as the Apostle teaches." Source: Pope [...]
"This sacrament is not only a sacrament, but also a sacrifice. For, it has the nature of a sacrifice inasmuch as in this sacrament Christ's Passion is represented, whereby Christ 'offered Himself a Victim to God' (Eph. 5:2), and it has the nature of a sacrament inasmuch as invisible grace is bestowed in this sacrament [...]
"It is certain that if we had the happiness of many saints to whom God showed Himself, sometimes as an infant in the manger, sometimes on the Cross, we would be penetrated with a very great reverence for Him. But He is not less present with us under the sacramental veil." Source: St. John [...]
"The faithful need to be reminded that there can be no actuosa participatio in the sacred mysteries without an accompanying effort to participate actively in the life of the Church as a whole, including a missionary commitment to bring Christ's love into the life of society." Source: Pope Benedict XVI, SACRAMENTUM CARITATIS (Sacrament of [...]