You know you've achieved perfection in design, not when you have nothing more to add, but when you have nothing more to take away.
Antoine de Saint-Exupery

Whoso would be a man must be a nonconformist.
Ralph Waldo Emerson

Be master of your petty annoyances and conserve your energies for the big, worthwhile things. It isn't the mountain ahead that wears you out - it's the grain of sand in your shoe.
Robert Service