Most talk about 'super-geniuses' is nonsense. I have found that when 'stars' drop out, successors are usually at hand to fill their places, and the successors are merely men who have learned by application and self-discipline to get full production from an average, normal brain.

A man will succeed in anything about which he has real enthusiasm, in which he is genuinely interested, provided that he will take more thought about his job than the men working with him. The fellow who sits still and does what he is told will never be told to do big things.

To my mind, the best investment a young man starting out in business can possibly make is to give all his time, all his energies, to work - just plain, hard work.

Charles M. Schwab Quotes