We've all seen the bumper sticker that reads "Live simply so that others may simply live" -- a ringing call to a sustainable life. Such a life involves, in the words of Mennonite author Doris Janzen Longacre, "cultivating a gentle way of handling the erth, versatility in the face of shortage, inner provision for contentment and, more than all that, commitment to live justly in our world."
A sufficient and sustainable life means being a bright, creative part of the solution rather than one more tired cog in the dreadful turning wheels of the problem.
Sufficiency in involves the old virtues of thrift and frugality. Sustainability comes from innovation and creativity. It looks something like this: A friend reuses her bath and dishwater, hauling it out to the garden for her vegetables. It's a lot of bother, she says, but she doesn't mind. She gets exercise and cuts down on her water bill, while at the same time deriving a rich satisfaction from this way of doing things.