"Honesty is the rarest wealth anyone can possess, and yet all the honesty in the world ain't lawful tender for a loaf of bread." Josh Billings. Josh billings was a humorist whose sayings and writings were very popular because they were delivered in a very aqward manner. That quote if broken down means to me that honesty is the best thing anyone can own although all the honesty in the world is still not worth a penny. So the quote is saying if you are honest or not you still don't have anything to show for it, except respect and moral rightness in your conscience. …
