The most revolutionary document of Vatican II, the Nostra Aetate, proclaims for the first time that Catholics need to acknowledge other world religions and their validity. In this document, the cardinals and bishops of the council state:
That through dialogue and collaboration with the followers of other religions, carried out with prudence and love and in witness to the Christian faith and life, they recognize, preserve, and promote the good things, spiritual and moral, as well as the social-cultural values found among these men (Nostra Aetate 1965).
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