Among other possibilities, money was invented to make it possible for a foolish man to control wise men; a weak man, strong men; a child, old men; an ignorant man, knowledgeable men; and for a dwarf to control giants.

Some of the things you think are impossible to do can be done even by you.

Greed is a contagious mental illness without which civilization as we know it would not have been possible.

More often than not, an inspirational or motivational speaker is someone who makes money from telling us that we can do all of the things that we can do … and pretty much all of the things that we cannot do.

It is humanly impossible to be selfless. As a matter of fact, human beings are inherently selfish.

Nothing holds back human progress as frequently as the misbelief that the words ‘impossible’ and ‘improbable’ are synonyms.