Take heed, watch and pray; for you do not know when the time will come. It is like a man going on a journey, when he leaves home and puts his servants in charge, each with his work, and commands the doorkeeper to be on the watch. Watch therefore—for you do not know when the master of the house will come, in the evening, or at midnight, or at cockcrow, or in the morning— lest he come suddenly and find you asleep. And what I say to you I say to all: Watch.”
The Second Vatican Council teaches that if we are to derive the true meaning from the sacred texts, attention must be devoted “not only to their content but to the unity of the whole of Scripture, the living tradition of the entire Church, and the analogy of faith. […] Everything to do with the interpretation of Scripture is ultimately subject to the judgment of the Church, which exercises the divinely conferred communion and ministry of watching over and interpreting the Word of God” (Dei Verbum, 12).
St. John Paul II, when he promulgated the Catechism of the Catholic Church, explained that the Catechism “is a statement of the Church’s faith and of catholic doctrine, attested to or illumined by Sacred Scripture, the Apostolic Tradition and the Church’s Magisterium.” He went on to “declare it to be a sure norm for teaching the faith and thus a valid and legitimate instrument for ecclesial communion” (Fidei Depositum).
Cited in the Catechism:
Passages from this Gospel reading are cited in the Catechism, paragraphs 672, 2612 and 2849.
13:33–37. “Watch”: since we do not know when the Lord will come, we must be prepared. Vigilance is, above all, love. A person who loves keeps the commandments and looks forward to Christ’s return; for life is a period of hope and waiting. It is the way towards our encounter with Christ the Lord. The first Christians often tenderly repeated the aspiration: “Come, Lord Jesus” (1 Cor 16:22; Rev 22:20). By expressing their faith and charity in this way, those Christians found the interior strength and optimism necessary for fulfilling their family and social duties, and interiorly detached themselves from earthly goods, with the self-mastery that came from hope of eternal life.
Source: The Navarre Bible: Text and Commentaries. Biblical text from the Revised Standard Version and New Vulgate. Commentaries by members of the Faculty of Theology, University of Navarre, Spain.
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“Ignorance of Scripture is ignorance of Christ.” St Jerome