80 We cannot conclude this Encyclical Letter without addressing some words to those of Our children who are more or less tainted with the Communist plague. We earnestly exhort them to hear the voice of their loving Father. We pray the Lord to enlighten them that they may abandon the slippery path which will precipitate one and all to ruin and catastrophe, and that they recognize that Jesus Christ, Our Lord, is their only Savior: "For there is no other name under heaven given to man, whereby we must be saved."
Source: Divini Redemptoris (Vatican.va)