Saint Callistus I is remembered as a pope and martyr, and the suggested readings emphasize the nature of Christian leadership. Peter exhorts presbyters to shepherd God’s flock willingly and by example rather than domination. Psalm 40 presents obedience to God’s will as the heart of authentic service. In the Gospel, the Apostles argue about greatness, and Jesus responds by redefining authority through service: he himself stands among them as one who serves. This teaching reaches beyond ordained ministry. Every Christian exercise of authority—within family, parish, religious community, workplace, or society—must be purified by the pattern of Christ. Mark 10:42–45, Philippians 2:5–11, and John 13:1–15 reveal the same principle: Christian greatness is cruciform service.

The Church’s hierarchical structure must therefore never be understood as domination. CCC 871–913 explains the different forms of participation in Christ’s mission, while CCC 876 teaches that ministers exercise their service for the sake of the People of God. Saint Callistus’ witness reminds the Church that pastoral authority ultimately belongs to Christ. The shepherd receives his flock as a trust. Psalm 23 and Ezekiel 34:11–16 reveal God himself as the true Shepherd, while 1 Peter 5:4 points toward Christ as the Chief Shepherd. Human ministers participate in this pastoral care only by remaining faithful to Christ.

The Eucharist reveals the supreme form of Christian leadership because Christ gives himself as food for his people. The altar overturns worldly notions of greatness: the Lord who possesses all things gives himself entirely. CCC 1323 and 1366–1367 teach that the Eucharist makes present Christ’s sacrificial self-offering. Today’s memorial therefore invites examination of how we use responsibility and influence. Do we seek recognition, control, or privilege, or do we seek the good of those entrusted to us? Through Eucharistic communion, sacramental Reconciliation, and humble service, Christ forms his Church into a people whose authority is expressed through charity.