A meditation on the Twenty-First Sunday after Pentecost, from Dom Guéranger’s The Liturgical Year.The Twenty-First Sunday after Pentecost in the traditional Roman liturgy centers on trust in God’s providence, the call to spiritual vigilance, and the duty of mercy toward others. The Introit and Collect express confidence in God’s sovereign will and protection, reminding the faithful that their refuge and strength are found in Him. The Epistle (Ephesians 6:10–17) exhorts Christians to “put on the armor of God,” highlighting the need for interior strength, faith, and perseverance in the spiritual battle against evil. The Gospel (Matthew 18:23–35), recounting the parable of the unforgiving servant, teaches that divine mercy must inspire our own forgiveness of others. Together, the day’s prayers and readings form a cohesive message: amid the struggles of life, the Christian must rely on God’s grace, fight steadfastly against sin, and imitate His mercy in order to attain eternal peace.Dom Prosper Guéranger's The Liturgical Year, a monumental fifteen-volume work, offers a comprehensive exploration of the Catholic Church’s liturgical calendar, guiding readers through the spiritual and historical richness of the Church’s worship. Written in the 19th century, the series provides daily meditations, historical context, and liturgical texts for the Mass and Divine Office, covering the entire cycle of seasons—Advent, Christmas, Lent, Passiontide, Easter, and the Time after Pentecost—as well as feast days of saints. Guéranger’s work, rooted in a deep contemplative spirit, aims to immerse the faithful in the Church’s prayerful life, emphasizing the unity of faith through the axiom lex orandi, lex credendi ("the law of prayer is the law of belief"), and remains a cherished resource for Catholics seeking to deepen their spiritual lives. Dom Prosper Guéranger (1805–1875) was a French Benedictine monk, liturgical scholar, and founder of the Solesmes Abbey, renowned for his pivotal role in reviving the Benedictine Order in France and restoring the Roman liturgy after the disruptions of the French Revolution. Born in Sablé-sur-Sarthe, he entered the priesthood in 1827 and, inspired by a vision to restore monastic life, reestablished the Benedictine community at Solesmes in 1833, becoming its first abbot. A staunch defender of ultramontanism and traditional Catholic worship, he also championed the revival of Gregorian chant, significantly influencing the liturgical renewal movement.Please note: The entries of the Liturgical Year are primarily authored by Dom Prosper Guéranger, but occasionally contain editors’ additions of subsequent information and events that are relevant to the given feast.Link to the Dom Guéranger's Liturgical Year playlist (updated daily, unless a ferial day): https://www.youtube.com/playlist?list=PLZKdyYnV_bkh7rH6piW0ShgsdcefFoOvJ