There's still plenty of people who have this deep conviction that America is a Christian country and ought to say so in its Constitution, etc. But that's not the legal basis on which we're framed. So the flourishing of religion, of religious diversity, is really built into who we are.

People get tired of talking about American exceptionalism, but I think this is an extraordinary thing about the United States, that we are a nation of immigrants, first of all, that is built upon a pluralistic society of native people that were here to begin with. The issue of diversity is really with us from the beginning.

I grew up going around with family, camping and living in a very beautiful mountain valley, knowing the names of the mountains and the rivers. I think it's no accident that I ended up studying the geography of India and knowing the names of the mountains and the rivers and all of that. I loved it. I think it gives a sense of space and a can-do-ness that was very powerful.

Places where one can experience some of that separation from the world of the familiar, to defamiliarize ourselves with what we take for granted and enter into the ebb and flow of another culture, it certainly is one of the more valuable things that we do as human beings.

I will say that the power of being a stranger in someone else's religious community has its own lessons, really. It is something like the power of visiting another very happy extended family and being at their table.

We are built on a structure of the freedom of religion and the non-establishment of religion. That really is a pretty sturdy rudder for the U.S.

My first intellectual challenge was to try to understand this incredible city of Banaras (also called Varanasi) in India and its meaning for Hindus. That was the place I lived for the first year I was in India and I've been back many times. It's a kind of home to me.