Our best built certainties are but sand-houses and subject to damage from any wind of doubt that blows
Mark TwainWhat is the chief end of man?-to get rich. In what way?-dishonestly if we can; honestly if we must.
Mark TwainThe perfection of wisdom, and the end of true philosophy is to proportion our wants to our possessions, our ambitions to our capacities, we will then be a happy and a virtuous people.
Mark Twain