64. Undoubtedly a useful instrument for imparting a knowledge of the faith and for maintaining communion in the faith are adult catechisms, approved by the proper ecclesiastical authority (cf. can. 775, §§ 1-2). In conjunction with them, the resources of the sciences of communications and language should be utilized in order to communicate the Christian message with greater facility and effectiveness. We can never recall too often that "the language used must elicit the attention and interest of modern adults. The best forms of communication for reaching them, including signs, gestures and symbols, must be employed" (John Paul II, Discourse to the members of COINCAT).
65. The mass media, whe
