[I]magine that a 25-year-old first-year MBA student is considering merging his future economic interests with those of a 25-year-old day laborer. The… - Warren Buffett

When returns on capital are ordinary, an earn-more-by-putting-up-more record is no great managerial achievement. You can get the same result personally while operating from your rocking chair. Just quadruple the capital you commit to a savings account and you will quadruple your earnings. You would hardly expect hosannas for that particular accomplishment. Yet, retirement announcements regularly sing the praises of CEOs who have, say, quadrupled earnings of their widget company during their reign — with no one examining whether this gain was attributable simply to many years of retained earnings and the workings of compound interest.

Accounting numbers, of course, are the language of business and as such are of enormous help to anyone evaluating the worth of a business and tracking its progress. Charlie and I would be lost without these numbers: they invariably are the starting point for us in evaluating our own businesses and those of others. Managers and owners need to remember, however, that accounting is but an aid to business thinking, never a substitute for it.

When a person with money meets a person with experience, the one with experience ends up with the money and the one with money leaves with experience.