I knew I was going to be a journalist when I was eight years old and I saw the printing presses rolling at the Sydney newspaper where my dad worked as a proofreader.

Yes, it seems we've got this mutant gene in our human personality that makes us susceptible to this same kind of mistake over and over again. It's really uncanny how we build these beautiful multicultural edifices and then allow this switch to be flipped and everybody goes, 'Oh, the other, get them out of here.

If there is one class of person I have never quite trusted, it is a man who knows no doubt.

'You've got mail!' exclaims the cheery automaton at America Online. The flag on the mailbox icon waves invitingly on my computer screen. For a second, I'm 10 years old again, waiting for the postman's whistle to slice the stillness of an Australian afternoon.

And when I'd be reporting in Israel, Palestinians would say, the Jews they're not like us, and the Jews would say the same things about the Palestinians, they don't want what we want. And I never bought it as a reporter and I don't buy it as a novelist. I think, you know, the sound of somebody crying for their lost child sounds the same.

The day in 2004 when the radiologist told me I had invasive cancer, I walked down the hospital corridor looking for a phone to call my husband, and I could almost see the fear coming toward me like a big, black shadow.

Moral certainty can deafen people to any truth other than their own.