107 Then we see another circle around us. This too is vast in extent, yet not so far away from us. It comprises first of all those men who worship the one supreme God, whom we also worship. We would mention first the Jewish people, who still retain the religion of the Old Testament, and who are indeed worthy of our respect and love. Then we have those worshipers who adhere to other monotheistic systems of religion, especially the Moslem religion. We do well to admire these people for all that is good and true in their worship of God. And finally we have the followers of the great Afro-Asiatic religions. Obviously we cannot agree with these various forms of religion, nor can we adopt an indifferent or uncritical attitude toward them on the assumption that they are all to be regarded as on an equal footing, and that there is no need for those who profess them to enquire whether or not God has Himself revealed definitively and infallibly how He wishes to be known, loved, and served. Indeed, honesty compels us to declare openly our conviction that the Christian religion is the one and only true religion, and it is our hope that it will be acknowledged as such by all who look for God and worship Him.
Source: Ecclesiam Suam (Vatican.va)