In today’s reading from the Constitution on the Sacred Liturgy, we begin Chapter II on “The Most Sacred Mystery of the Eucharist.” Of course, no reflection on the liturgy can take place apart from the Eucharist.
These introductory paragraphs call to mind the institution of the Eucharist at the Last Supper (article 47) and remind us again of the Council’s desire for the faithful to full, active, conscious participation in the liturgy (article 48 & 49).
Here are thefootnotes:
 Cf. St. Augustine, Tractatus in Ioannem, VI, n. 13.
 Roman Breviary, feast of Corpus Christi, Second Vespers, antiphon to the Magnificat.
 Cf. St. Cyril of Alexandria, Commentary on the Gospel of John, book XI, chap. XI-XII: Migne, Patrologia Graeca, 74, 557-564.