"In the sacrament of the altar, the Lord meets us, men and women created in God's image and likeness (cf. Gen 1:27), and becomes our companion along the way. In this sacrament, the Lord truly becomes food for us, to satisfy our hunger for truth and freedom." -Pope Benedict XVI
"Believe and adore. Believe that Jesus Christ is in this sacrament as truly as He was nine months in the womb of Mary, as really as He was nailed to the Cross. Adore in humility and gratitude." -St. John Vianney
"The Eucharist is 'the source and summit of the Christian life.' 'The other sacraments, and indeed all ecclesiastical ministries and works of the apostolate, are bound up with the Eucharist and are oriented toward it. For in the blessed Eucharist is contained the whole spiritual good of the Church, namely Christ himself, our Pasch.'" -Catechism [...]
"In the Holy Eucharist the faithful are nourished and strengthened at the same banquet and by a divine, ineffable bond are united with each other and with the Divine Head of the whole Body."
"In this gift Jesus Christ entrusted to his Church the perennial making present of the paschal mystery. With it he brought about a mysterious “oneness in time” between that Triduum and the passage of the centuries." -Pope St. John Paul II
"This is My Body" - then it is no longer bread. "This is My Blood" - then it is no longer wine. Jesus Christ has said it. I believe because He is the Truth, who does not deceive, the Power that all things obey. -St. John Vianney
"Absolutely speaking, the sacrament of the Eucharist is the greatest of all the sacraments… because it contains Christ Himself substantially: whereas the other sacraments contain a certain instrumental power which is a share of Christ's power." -St. Thomas Aquinas