§793
Creed › … › Paragraph 2. the Church - People of God, Body of Christ, Temple of the Holy Spirit
"Christ is the Head of this Body"
Christ unites us with his Passover: all his members must strive to resemble him, "until Christ be formed" in them. "For this reason we . . . Are taken up into the mysteries of his life, . . . Associated with his sufferings as the body with its head, suffering with him, that with him we may be glorified."
Source: Catechism of the Catholic Church (Vatican.va)