Since Hiroshima and the Holocaust, science no longer holds its pristine place as the highest moral authority. Instead, that role is taken by human rights. It follows that any assault on Jewish life - on Jews or Judaism or the Jewish state - must be cast in the language of human rights.

Close to a billion people - one-eighth of the world's population - still live in hunger. Each year 2 million children die through malnutrition. This is happening at a time when doctors in Britain are warning of the spread of obesity. We are eating too much while others starve.

When you've got Jews and Christians, Muslims, Sikhs and Hindus removing graffiti from buildings, or getting drug dealers off the street, that's side by side. When you do that, you take it from the very elevated level of interfaith dialogue to the street level of neighbors. You get them working side by side, and they become friends. Friendship sometimes counts for more than interfaith agreement or understanding. Friendship is deeply human.

Follow your passion. Nothing - not wealth, success, accolades or fame - is worth spending a lifetime doing things you don't enjoy.

I do not want to suggest that you have to be religious to be moral.

If we are to negotiate the coming years safely, we may need a new kind of leadership. To put it more precisely, we need the rediscovery of an ancient kind of leadership that has rarely been given the prominence it deserves. I mean the leader as teacher.

The greatest single antidote to violence is conversation.