Very often, deceived by the Evil One, men have become vain in their reasonings, and have exchanged the truth of God for a lie, and served the creature rather than the Creator. Or else, living and dying in this world without God, they are exposed to ultimate despair. 333

Catechism number 857

The Church is apostolic because she is founded on the apostles, in three ways:
- she was and remains built on "the foundation of the Apostles,"362 The witnesses chosen and sent on mission by Christ himself;363
- with the help of the Spirit dwelling in her, the Church keeps and hands on the teaching,364 The "good deposit," the salutary words she has heard from the apostles;365
- she continues to be taught, sanctified, and guided by the apostles until Christ's return, through their successors in pastoral office: the college of bishops, "assisted by priests, in union with the successor of Peter, the Church's supreme pastor":366

You are the eternal Shepherd

who never leaves his flock untended.

Through the apostles you watch over us and protect us always.

You made them shepherds of the flock

The Apostles' mission

Official source ↗