Every doctor will allow a colleague to decimate a whole countryside sooner than violate the bond of professional etiquette by giving him away.

The love of economy is the root of all virtue.

People always get tired of one another. I grow tired of myself whenever I am left alone for ten minutes, and I am certain that I am fonder of myself than anyone can be of another person.

Now that we have learned to fly the air like birds, swim under water like fish, we lack one thing - to learn to live on earth as human beings.

Money is a most important thing in the world.

With the exception of capitalism, there is nothing so revolting as revolution.

All censorships exist to prevent anyone from challenging current conceptions and existing institutions. All progress is initiated by challenging current conceptions, and executed by supplanting existing institutions. Consequently, the first condition of progress is the removal of censorship.