77 At the same time the State must allow the Church full liberty to fulfill her divine and spiritual mission, and this in itself will be an effectual contribution to the rescue of nations from the dread torment of the present hour. Everywhere today there is an anxious appeal to moral and spiritual forces; and rightly so, for the evil we must combat is at its origin primarily an evil of the spiritual order. From this polluted source the monstrous emanations of the communistic system flow with satanic logic. Now, the Catholic Church is undoubtedly preeminent among the moral and religious forces of today. Therefore the very good of humanity demands that her work be allowed to proceed unhindered.
Source: Divini Redemptoris (Vatican.va)