Reform yourself. That way there will be one less rascal in the world.

Heh. From Flow by Mihaly Csikszentmihalyi

But no social change can come about until the consciousness of individuals is changed first. When a young man asked Carlyle how he should go about reforming the world, Carlyle answered, “Reform yourself. That way there will be one less rascal in the world.” The advice is still valid. Those who try to make life better for everyone without having learned to control their own lives first usually end up making things worse all around.