John Bates Clark,
Essentials of Economic Theory
“ How Unlike Services may be rendered by One Good at the Same Time.—What people want of any useful thing is an effect in themselves,—a pleasure or a benefit which they expect to get,—and apart from this subjective result they would not want the thing at all. The power to confer a particular benefit is a utility. Men buy goods solely for their utilities, and they measure these service-rendering powers in the things offered to them and pay for them accordingly. ”
