5. Given the diversity of circumstances in which these centers have arisen and their somewhat recent experience, questions and problems have also arisen which it is helpful to recognize in order to make appropriate discernment and clarification. Some have to do with the relationship between the identity of each institute and communion in diversity, between the goal of the centers to offer a service to all and the freedom of institutes to take advantage of centers or not. Other questions concern the vision of apostolic religious life which underlies the pedagogical structure, and thus of the design of the programs and of the criteria for choosing the teaching personnel. Still others are concerned with the effective participation of those responsible for formation in the institutes, monitoring formation, the real conditions which make it possible to transform temporarily living together in the centers into an experience of deep ecclesial communion and of authentic spiritual and apostolic formation, open to the needs of evangelization.(¹²)