The full text of the speech can be found here (French).
These excerpts come from the Vatican Information Service.
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RELIGIONS ARE A FORCE FOR PEACE AND RECONCILIATION
VATICAN CITY, 17 DEC 2009 (VIS) - Today in the Vatican, the Holy Father received the Letters of Credence of eight new ambassadors to the Holy See: Hans Klingenberg of Denmark; Francis K. Butagira of Uganda; Suleiman Mohamad Mustafa of Sudan; Elkanah Odembo of Kenya; Mukhtar B. Tileuberdi of Kazakhstan; Abdul Hannan of Bangladesh; Alpo Rusi of Finland, and Einars Semanis of Latvia.
Addressing the diplomats as a group, the Pope referred to the need for "a just relationship between human beings and the creation in which they live and work" In this context, he underlined the need for "environmental responsibility" because "the continual degradation of the environment constitutes a direct threat to man's survival and his development, and threatens peace among individuals and peoples".
Benedict XVI encouraged the political authorities of the countries the ambassadors represent, and those of all nations, "not only to increase their efforts in favour of environmental protection but also - since the problem cannot be faced only at the national level - to produce proposals and provide encouragement in order to reach vital international agreements that may prove useful and just for all sides".
After then highlighting the importance of "converting or modifying the current development model of our societies", the Pope pointed out that "the Church proposes that this profound change ... be guided by the notion of the integral development of the human person".
"If it is true", said the Holy Father, "that over history religions have often been a factor of conflict, it is also nonetheless true that religions lived according to their profound essence have been, and still are, a force for reconciliation and peace. At this moment in history religions must, through open and sincere dialogue, seek the path of purification in order to conform ever more closely to their true vocation".
"Peaceful coexistence of different religions in each nation is sometimes difficult", he continued. "More than a political problem, this co-existence is a religious problem which lies within the bosom of each one of those traditions. Believers are called to ask God about His will concerning each human situation".
"For people of faith or people of good will, the resolution of human conflicts and the delicate coexistence of different religious expressions can be transformed into an opportunity for human coexistence within a social order full of goodness and wisdom, the origin and impulse of which lies in God. Such coexistence, respecting the nature of things and the inherent wisdom that comes from God, is called peace", said Pope Benedict.
"The peace we so long for will not come into being save by the joint action of individuals, who discover the true nature of God, and of leaders of civil and religious society who - respecting the dignity and faith of all people - know how to give religion its noble and authentic role in creating and perfecting the human person. This overall reworking, at once temporal and spiritual, will enable a new beginning towards the peace that God wishes to be universal".