"Why is it that in most children education seems to destroy the creative urge? Why do so many boys and girls leave school with blunted perceptions and a closed mind? A majority of young people seem to develop mental arteriosclerosis forty years before they get the physical kind. Another question: why do some people remain open and elastic into extreme old age, whereas others become rigid and unproductive before they're fifty? It's a problem in biochemistry and adult education."