Benedict XVI at the White House

...From the dawn of the Republic, America’s quest for freedom has been guided by the conviction that the principles governing political and social life are intimately linked to a moral order based on the dominion of God the Creator. The framers of this nation’s founding documents drew upon this conviction when they proclaimed the "self-evident truth" that all men are created equal and endowed with inalienable rights grounded in the laws of nature and of nature’s God. The course of American history demonstrates the difficulties, the struggles, and the great intellectual and moral resolve which were demanded to shape a society which faithfully embodied these noble principles. In that process, which forged the soul of the nation, religious beliefs were a constant inspiration and driving force, as for example in the struggle against slavery and in the civil rights movement. In our time too, particularly in moments of crisis, Americans continue to find their strength in a commitment to this patrimony of shared ideals and aspirations...

Freedom is not only a gift, but also a summons to personal responsibility. Americans know this from experience – almost every town in this country has its monuments honoring those who sacrificed their lives in defense of freedom, both at home and abroad. The preservation of freedom calls for the cultivation of virtue, self-discipline, sacrifice for the common good and a sense of responsibility towards the less fortunate. It also demands the courage to engage in civic life and to bring one’s deepest beliefs and values to reasoned public debate. In a word, freedom is ever new...

The Church, for her part, wishes to contribute to building a world ever more worthy of the human person, created in the image and likeness of God. She is convinced that faith sheds new light on all things, and that the Gospel reveals the noble vocation and sublime destiny of every man and woman. Faith also gives us the strength to respond to our high calling, and the hope that inspires us to work for an ever more just and fraternal society. Democracy can only flourish, as your founding fathers realized, when political leaders and those whom they represent are guided by truth and bring the wisdom born of firm moral principle to decisions affecting the life and future of the nation...

— Full text here.