One day - I remember it was a Sabbath afternoon - I came to the synagogue with a book in my hand. I saw a commentary on the Bible by a certain Rabbi Moshe Dessauer, better known as Moses Mendelssohn. An elderly man came up to me - I was then maybe 10 or 12. "What are you studying?" he said. "Dessauer's commentaries," I said. So he gave me a slap on my face.

Because I survived, I must do everything possible to help others.

In the word question, there is a beautiful word - quest. I love that word. We are all partners in a quest. The essential questions have no answers. You are my question, and I am yours - and then there is dialogue. The moment we have answers, there is no dialogue. Questions unite people.

Drawn to childhood, the old man will seek it in a thousand different ways.

When I say it doesn't make much difference, I mean in terms of the importance of the piece of literature.

Whatever we thought was certain is no longer certain, and therefore in science probably certain things must be correct, but in human behaviour I am not so sure.

I don't see the junk youth. I only meet students, and even those who are not formally at the university, if they come to listen to me, they come to read me, it means they are not junk students.