Speech has arisen through the need for expression. Certain factors have contributed to making it the paramount utilitarian method of expression. There are ideas and things expressible in words, but there are ideas better expressed in music, the person with no musical ear, or without discipline in the language of music, lacks the key to the door of the world of musical experience. But we live in a world of volume and space; it is hard to conceive of the person who is space-blind or volume-deaf. The great majority of people have the means of approach to plastic beauty as part of their natural equipment. The teacher can develop this natural endowment as Necessity, the greatest teacher, has developed speech.

'Painting and Culture' p. 57 - Search for the Real and Other Essays (1948)