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%.
Andrew CarnegieThere is scarcely an instance of a man who has made a fortune by speculation and kept it
Andrew CarnegieNot evil, but good, has come to the race from the accumulation of wealth by those who have the ability and energy that produce it.
Andrew Carnegie