Mystici Corporis Christi §52

⁵² These truths which We have expounded, Venerable Brethren, briefly and succinctly tracing the manner in which Christ our Lord wills that His abundant graces should flow from His fulness into the Church, in order that she should resemble Him as closely as possible, help not a little to explain the third reason why the social Body of the Church should be honored by the name of Christ - namely, that our Savior Himself sustains in a divine manner the society which He founded.