The average person puts only 25% of his energy and ability into his work. The world takes off its hat to those who put in more than 50% of their capacity, and stands on its head for those few and far between souls who devote 100%.
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About Andrew Carnegie
Andrew Carnegie was a 19th-century American industrialist and philanthropist. Andrew Carnegie was a Scottish-American industrialist and philanthropist. Carnegie led the expansion of the American steel industry in the late-19th century and became one of the richest Americans in history. Read more on Wikipedia →