Fool me once, shame on you; fool me twice, shame on me. —Chinese proverb

Nothing will ever be attempted if all possible objections must be first overcome. –Samuel Johnson

One never notices what has been done; one can only see what remains to be done. –Marie Curie

Ambition is the path to success. Persistence is the vehicle you arrive in. –Bill Bradley 

To err is human—but it feels divine. –Mae West

Ask your child what he wants for dinner only if he’s buying. –Fran Lebowitz

No man ever distinguished himself who could not bear to be laughed at. –Marie Edgeworth