Because for most of us, suicide is a moment we'll never choose. It's only for people like Lexy, who know they might choose eventually, who believe they have a choice to make.

It's gratifying to know that you've appeared in someone else's dreams. It's proof that you exist, in a way, proof that you have substance and value outside the walls of your own mind.

I'm not going to feel guilty for wanting the things that everyone wants.

The conclusion I have reached is that, above all, dogs are witnesses.

It's true, isn't it, that each of us has two hearts? The secret heart, curled behind like a fist, living gnarled and shrunken beneath the plain, open one we use every day.

You wake up and you feel - what? Heaviness, an ache inside, a weight, yes. A soft crumpling of the flesh. A feeling like all the surfaces inside you have been rubbed raw. A voice in your head - no, not voices, not like hearing voices, nothing that crazy, just your own inner voice, the one that says 'Turn left at the corner' or 'Don't forget to stop at the post office,' only now it's saying, 'I hate myself.' It's saying, 'I want to die.'

How can it be, I wondered, that we can be lying in bed next to a person we love wholly and helplessly, a person we love more than our own breath, and still ache to think of the one who caused us pain all those years ago? It's the betrayal of this second heart of ours, its flesh tied off like a fingertip twined tightly round with a single hair, blue-tinged from lack of blood. The shameful squeeze of it.