A disease is never a mere loss or excess. There is always a reaction on the part of the organism or individual to restore, replace or compensate for and to preserve its identity, however strange the means may be.
Oliver SacksMusic 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.
Oliver Sacks