And first of all, by the death of our Redeemer, the New Testament took the place of the Old Law which had been abolished; then the Law of Christ together with its mysteries, enactments, institutions, and sacred rites was ratified for the whole world in the blood of Jesus Christ. For, while our Divine Saviour was preaching in a restricted area — He was not sent but to the sheep that were lost of the House of Israel — the Law and the Gospel were together in force; but on the gibbet of His death Jesus made void the Law with its decrees fastened the handwriting of the Old Testament to the Cross, establishing the New Testament in His blood shed for the whole human race. “To such an extent, then,” says St. Leo the Great, speaking of the Cross of our Lord, “was there effected a transfer from the Law to the Gospel, from the Synagogue to the Church, from the many sacrifices to one Victim, that, as Our Lord expired, that mystical veil which shut off the innermost part of the temple and its sacred secret was rent violently from top to bottom.”
Pius XII, Encyclical Letter Mystici corporis Christi, no. 29 (29 June 1942).
The secretary for the Unity of Christians said on 18 November 1964 in the Council Hall about Nostra Aetate: “As to the character of the declaration, the secretariat does not want to write a dogmatic declaration on non-Christian religions, but, rather, practical and pastoral norms.” Nostrae Aetate does not have any dogmatic authority, and thus one cannot demand from anyone to recognize this declaration as being dogmatic. This declaration can only be understood in the light of tradition and of the continuous Magisterium. For example, there exists today, unfortunately, the view — contrary to the Catholic Faith — that there is a salvific path independent of Christ and His Church. That has also been officially confirmed last of all by the Congregation for the Faith itself in its declaration, Dominus Jesus. Therefore, any interpretation of Nostrae Aetate which goes into this direction is fully unfounded and has to be rejected.
Archbishop Guido Pozzo, Secretary to the Pontifical Commission Ecclesia Dei, interview in Die Zeit (32/2016).