In 2009, Humanist Canada launched a transit station campaign in Toronto to raise awareness about Humanism. Rather than simply adopt the slogan of an existing campaign that originated in Britain (There's probably no god so stop worrying and enjoy your life.), we chose something that spoke more to who we are rather than who we are not:
"You Can be Good Without God"
The myth that only people who believe in the power of a supernatural being are morally superior has persisted for far too long. Humanism holds that the development of morality, of a sense of right and wrong, is fundamental to the development of the human species. Without developing a rule of reciprocal altruism (otherwise known as 'the golden rule), chances are we wouldn't have made it this far.
For an excellent summing up and debunking of the myths of "secular moral chaos" by Sam Harris, click the link below: