"The church of the living God is the pillar and foundation of the truth." (1 Timothy 3:15)
Paul gives the earliest systematic list of qualifications for the overseer, the bishop: above reproach, faithful to his spouse, temperate, self-controlled, respectable, hospitable, able to teach, not given to drunkenness, not violent but gentle, not quarrelsome, not a lover of money, managing his own household well with proper respect. He must not be a recent convert and must have a good reputation with outsiders. The deacon likewise must be worthy of respect, sincere, not indulging in much wine, not pursuing dishonest gain, holding the mystery of the faith with a clear conscience. The Catechism draws from this passage the foundational criteria for holy orders: the bishop is called to be the image of Christ the Good Shepherd in the community entrusted to him, and the qualities listed here describe what that image requires of the whole person (CCC 1558).
Paul tells Timothy he is writing so that he will know how people ought to conduct themselves in God's household, which is the Church of the living God, the pillar and foundation of the truth. The mystery of godliness is great: he appeared in the flesh, was vindicated by the Spirit, was seen by angels, was preached among the nations, was believed on in the world, was taken up in glory. This six-line hymn, possibly the earliest creedal statement in the Church, encapsulates the whole Gospel. The Catechism identifies the Church as the pillar and bulwark of truth, the community entrusted with preserving, proclaiming, and living the truth revealed in Christ (CCC 171).
Brothers and sisters, the Church is the pillar and foundation of the truth. Not any individual Christian, not any particular theologian, not any single diocese or religious community alone. The whole Church, guided by the Spirit through the apostolic succession, is the community that holds and guards the truth. This is why fidelity to the Church's teaching is not intellectual timidity but trust in the promise Christ made to his own body.
Lord Jesus, you appeared in flesh, were vindicated by the Spirit, and were taken up in glory. You have entrusted your truth to the Church, the pillar and foundation of the truth. Raise up bishops and deacons worthy of the mystery they serve. And let the whole Church be what you made her: the household of the living God. Through Christ our Lord. Amen.