"We in the "developed" world seem to have many auditory strategies that insulate us from the presence of silence, simplicity, and solitude. When I return to Western culture after time in desert, mountain or forest, I discover how we have filled our world with a multiplicity of noises, a symphony of forgetfulness that keeps our won thoughts and realizations, feelings and intuitions out of audible range."

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Given her deafness, the auditory part of the brain, deprived of its usual input, had started to generate a spontaneous activity of its own, and this took the form of musical hallucinations, mostly musical memories from her earlier life. The brain needed to stay incessantly active, and if it was not getting its usual stimulation..., it would create its own stimulation in the form of hallucinations.

— Oliver Sacks