"Thinking is the hardest work there is, which is probably the reason so few engage in it."
More Business Success Quote
"What is necessary to change a person is to change his awareness of himself."
"Employ your time in improving yourself by other men's writings so that you shall come easily by what others have labored hard for."
"The work never is done while the power to work remains."
"Your most unhappy customers are your greatest source of learning."
"In the long run, men hit only what they aim at."
"In America nobody says you have to keep the circumstances somebody else gives you."