12. Consequently, since the mission of the Roman Curia is ecclesial, it claims the cooperation of the whole Church to which it is directed. For no one in the Church is cut off from others and each one indeed makes up the one and the same body with all others.

This kind of cooperation is carried out through that communion we spoke of at the beginning, namely of life, charity, and truth, for which the messianic people is set up by Christ Our Lord, taken up by Christ as an instrument of redemption, and sent out to the whole world as the light of the world and the salt of the earth. Therefore, just as it is the duty of the Roman Curia to communicate with all the Churches, so the pastors of the particular Churches, governing these Churches "as vicars and legates of Christ,"must take steps to communicate with the Roman Curia, so that, dealing thus with each other in all trust, they and the successor of Peter may come to be bound together ever so strongly.

This mutual communication between the centre of the Church and the periphery does not enlarge the scope of anyone’s authority but promotes communion in the highest degree, in the manner of a living body that is constituted and activated precisely by the interplay of all its members. This was well expressed by our predecessor Paul VI: "It is obvious, in fact, that along with the movement toward the centre and heart of the Church, there must be another corresponding movement, spreading from the centre to the periphery and carrying, so to speak, to each and all of the local Churches, to each and all of the pastors and the faithful, the presence and testimony of that treasure of truth and grace of which Christ has made Us the partaker, depository and dispenser."

All of this means that the ministry of salvation offers more effectively to this one and same people of God, a ministry, we repeat, which before anything else demands mutual help between the pastors of the particular Churches and the pastor of the whole Church, so that all may bring their efforts together and strive to fulfill that supreme law which is the salvation of souls.

History shows that when the Roman Pontiffs established the Roman Curia and adapted it to new conditions in the Church and in the world, they intended nothing other than to work all the better for this salvation of souls. With full justification did Paul VI visualise the Roman Curia as another cenacle or upper room of Jerusalem totally dedicated to the Church. We ourselves have proclaimed to all who work there that the only possible code of action is to set the norm for the Church and to deliver eager service to the Church. Indeed, in this new legislation on the Roman Curia it has been our will to insist that the dicasteries should approach all questions "by a pastoral route and with a pastoral sense of judgement, aiming at justice and the good of the Church and above all at the salvation of souls."