If people are highly successful in their professions they lose their senses. Sight goes. They have no time to look at pictures. Sound goes. They have no time to listen to music. Speech goes. They have no time for conversation. They lose their sense of proportion — the relations between one thing and another. Humanity goes.
In order that people may be happy in their work, these three things are needed: they must be fit for it; they must not do too much of it; and they must have a sense of success in it . . . a sure sense that so much work has been done well, and fruitfully done, whatever the world may say or think about it.