HUMANAE PERSONAE DIGNITATEM
Document published by the Vatican Secretariat for Unbelievers. Its purpose is to give general principles and particular norms for Catholics who engage in private or public dialogue with unbelievers, e.g., Communist Marxists. Among the specific norms the most practical one affects public dialogues, which may be either unofficial or official, as organized by ecclesiastical authorities. Regarding the latter, "it is only rarely that conditions exist in which such dialogue can take place between Christians and unbelievers." Unofficial discussions require, above all, that the Catholic representatives "be expert in doctrine, have moral integrity, and be good speakers" (August 28, 1968).