"Knowledge is two-fold, and consists not only in an affirmation of what is true, but in the negation of that which is false."

"He who studies books alone will know how things ought to be, and he who studies men will know how they are."

"There are two way of establishing a reputation, one to be praised by honest people and the other to be accused by rogues. It is best, however, to secure the first one, because it will always be accompanied by the latter."

"If rich, it is easy enough to conceal our wealth but, if poor, it is not quite so easy to conceal our poverty. We shall find it is less difficult to hide a thousand guineas, than one hole in our coat."

"We are the only beings on the planet who lead such rich internal lives that it's not the events that matter most to us, but rather, it's how we interpret those events that will determine how we think about ourselves and how we will act in the future."

"American men, as a group, seem to be interested in only two things, money and breasts. It seems a very narrow outlook."

"Money is just the poor man's credit card."

"The way to become rich is to put all your eggs in one basket and then watch that basket."