What do we mean by 'crazy?' What do we mean by 'mad?' At what point is a person just different and at what point can we call it a disease and say that they are not responsible for their actions? Or are we all slaves to the chemical processes that go on in our brains?

Normally I start with a plot, and write a synopsis, and the ideas come from the construction.

Evil is not a thing. It cannot take possession of you. It's the opposite; it's a void, an absence of goodness. The only thing you can be frightened of here is yourself.

All interesting heroes have an Achilles heel.

Sick is a relative concept. We're all sick. The question is, what degree of functionality do we have with respect to the rules society sets for desirable behavior? No actions are in themselves symptoms of sickness. You have to look at the context within which these actions are performed.

Christian ethics demand that you should not take revenge. The paradox is, naturally, that Christians worship a God who is the greatest avenger of them all. Defy him and you burn in eternal hell, an act of revenge which is completely out of proportion to the crime

I have questioned myself about the brutality in the last few novels. Actually in The Leopard, in hindsight, I feel I went a little bit too far with screaming blood. There are a couple of scenes that I regret and wish I had the chance to rewrite. Phantom has less blood.