10. The application in practice of these general criteria demands that Catholics working in the media shall have a deep knowledge and a faithful practice of their faith. It requires reciprocal trust and understanding among Christians, based on mutual respect, and with a view to doing things together in communications. This implies that Catholic communications services and Catholics engaged in communications will provide fair and objective information on the ecumenical movement and on the other Christian Churches and communities. Such an obligation will never prevent the faithful presentation of the specifically Catholic message in all its fullness. Reciprocity often stumbles on practical questions such as differences in the organization of the social communications apostolate, or different approaches to the financing of it. It is indispensable that pastoral authorities take these practical problems into consideration and allow a fair sharing of financial resources and a harmonization of working practices.