Dear Brothers and Sisters: In our catechesis on the Church, we now consider our fellow Christians who belong to other confessions or traditions. Divisions between Christ's followers are clearly contrary to his will, as expressed in his prayer to the Father that all might be one, so that the world might believe (cf. Jn 17:21). Christ desires us to be united in his love and in communion with one another; yet throughout history the Church has experienced temptations against this unity, leading to tragic divisions. We must not be resigned to these divisions, but must join our prayer to that of Jesus in imploring among all his followers constant openness to dialogue and appreciation of the gifts of others. In loving the Lord and sharing the riches of his love, we will better see what unites us rather than what separates us. By dwelling in the truth, and practicing forgiveness and charity, we will be ever more conformed to Christ's will, reconciled with one another, and led closer to the goal of full unity which he wills for all his disciples. - Francis, 10/8/14
In contrast with:
And here it seems opportune to expound and to refute a certain false opinion, on which this whole question, as well as that complex movement by which non-Catholics seek to bring about the union of the Christian churches depends. For authors who favor this view are accustomed, times almost without number, to bring forward these words of Christ: "That they all may be one.... And there shall be one fold and one shepherd,"[14] with this signification however: that Christ Jesus merely expressed a desire and prayer, which still lacks its fulfillment. - Pope Pius XI, Mortalium Animos, 1/6/28
The first statement is not a Catholic one.