Killing oneself is, anyway, a misnomer. We don't kill ourselves. We are simply defeated by the long, hard struggle to stay alive. When somebody dies after a long illness, people are apt to say, with a note of approval, "He fought so hard." And they are inclined to think, about a suicide, that no fight was involved, that somebody simply gave up. This is quite wrong.

Sometimes," says a fellow depressive, "I wish I was in a full body cast, with every bone in my body broken. That's how I feel anyway. Then, maybe, people would stop minimising my illness because they can actually see what's wrong with me. They seem to need physical evidence.

I had carried on when all I wanted was to be dead. I had stayed alive for other people. I never stayed alive for myself. I cannot begin to describe the intensity of that effort.

Wanting to die (or 'suicidal ideation'as the experts would have it) goes hand in hand with the illness. It is a symptom of severe depression, not a character failing or moral flaw. Nor is it, truly, a desire to die so much as a fervent wish not to go on living. All depressives understand that distinction.

Bad enough to be ill, but to feel compelled to deny the very thing that, in its worst and most active state, defines you is agony indeed.

I would not wish depression on anybody. And yet, it taught me a lot. I have not become suddenly mawkishly grateful for my life but I am more interested in it, more engaged you might say. When you have spent long years in the dark, there is joy in seeing the light and pleasure, above all, in the ordinary.

A friend called the other day.'How are you?' she said.The sun was shining, the sky a merciless blue. It was only eleven in the morning but I had been awake since three twenty. I was in bed because, as usual, I could think of nowhere else to go. I said that I was feeling low. Low is the depressive's euphemism for despair.She said: 'How can you be depressed on a day like this?'I wanted to say: 'If I had flu, would you ask me how I could be sick on a day like this?

As to whether the depression will come back, it is every depressive's fear.

Sometimes I think depression should be called the coping illness. So many of us struggle on, not daring or knowing how to ask for help. More of us, terribly, go undiagnosed.