Music can lift us out of depression or move us to tears - it is a remedy, a tonic, orange juice for the ear. But for many of my neurological patients, music is even more - it can provide access, even when no medication can, to movement, to speech, to life. For them, music is not a luxury, but a necessity.

To live on a day-to-day basis is insufficient; we need to transcend, transport, escape; we need meaning, understanding, and explanation; we need to see over-all patterns in our lives. We need hope, the sense of a future; the freedom to get beyond ourselves...in states of mind that allow us to rise above our immediate surroundings and see the beauty and value of the world we live in.

I cannot pretend I am without fear. But my predominant feeling is one of gratitude. I have loved and been loved; I have been given much and I have given something in return; I have read and traveled and thought and written. I have had an intercourse with the world, the special intercourse of writers and readers.

We see with the eyes, but we see with the brain as well. And seeing with the brain is often called imagination.

Enhancement not only allows the possibilities of a healthy fullness and exuberance, but of a rather ominous extravagance, aberration, monstrosity ... This danger is built into the very nature of growth and life. Growth can become over-growth, life 'hyper-life' ... The paradox of an illness which can present as wellness - as a wonderful feeling of health and well-being, and only later reveal its malignant potentials - is one of the chimaeras, tricks and ironies of nature.

Music can move us to the heights or depths of emotion. It can persuade us to buy something, or remind us of our first date. It can lift us out of depression when nothing else can. It can get us dancing to its beat. But the power of music goes much, much further. Indeed, music occupies more areas of our brain than language does-humans are a musical species.

For 'wellness', naturally, is no cause for complaint - people relish it, they enjoy it, they are at the furthest pole from complaint. People complain of feeling ill - not well ... Thus, though a patient will scarcely complain of being 'very well', they may become suspicious if they feel 'too well'.