This title is one way of describing the journey of renewal in the Catholic Church in modern times.
From a Church largely unaware of a need for renewal (the self-referential church of Pope Francis) to a Church knowing it is constantly in need of deep renewal.
"Christ summons the church, as she goes her pilgrim way, to that continual reformation of which she always has need, insofar as she is a human institution here on earth." (Decree on Ecumenism, para. 6).
Required: "a permanent renewal of the Church in greater fidelity to her vocation; such renewal is the driving-force of the movement toward unity".