For me the first great joy of traveling is simply the luxury of leaving all my beliefs and certainties at home, and seeing everything I thought I knew in a different light, and from a crooked angle.

What more could one ask of a companion? To be forever new and yet forever steady, to be strange and familiar all at once, with enough change to quicken my mind, enough steadiness to give sanctuary to my heart. The books on my shelf never asked to come together and they would not trust or want to listen to one another. But each is a piece of a stained-glass whole, without which I wouldn’t make sense to myself or to the world outside.

I began thinking about why am I constructing almost a shadow father or ghost father in my head into Graham Greene in response to the father who created me? What's going on here? I think a part of my sense is it's every boy's story. When we are kids, we imagine that to define ourselves or to find ourselves means charting your own individuality, making your own destiny and actually running away from your parents and your home and what you grew up with.

Yet [Dalai Lama] has said very strongly that basic freedoms of thought and speech have to be respected in Tibet and they're not at the moment. Tolerance doesn't mean accepting what's unfair.

Often when we think of exile we think of destruction or loss. But the Dalai Lama always says exile is reality, it's something we can make use of, and he has used it to get rid of everything that he thought was stifling and old, and to create a new, improved and much healthier Tibet.

I remember many years ago, I asked [Dalai Lama] about exile and he said: "Well, exile is good because it's brought me and my people closer to reality," and reality is almost a shrine before which he sits. Exile brings us up against the wall and forces us to rise to the challenge of the moment.

Gandhi or Bishop Tutu or the Dalai Lama. I think they're really embodiments of what we aspire to and, by keeping them in our heads, we're reminding ourselves of who we could be. That's what we're hoping to climb up towards.