The Church is…

The Church is not an institution devised and built at table, but a living reality. She lives along the course of time by transforming Herself, like any living being, yet Her nature remains the same. At Her heart is Christ.
— Roman Guardini (1885-1968)

Because Christ comes…

Because Christ comes to us in human hands, just as he first came in a woman’s arms, no one need ever be quite alone and without human help. He comes to the loneliest, to outcasts, degenerates, strangers, to prisoners and to men and women in the condemned cell, and comes to them all in the hands of a fellow creature who is lead to them by the Spirit of Love.
–Caryll Houselander (1901-1954)

The Catholic Church…

But what is also to the point, let us note that the very tradition, teaching, and faith of the Catholic Church from the beginning was preached by the Apostles and preserved by the Fathers. On this the Church was founded; and if anyone departs from this, he neither is, nor any longer ought to be called, a Christian.
–Saint Athanasius the Great (c. 296-373)