or even habit?
What if the "custom" is not beneficial for the people involved? Is it still "the great guide of human life"? It shouldn't be a custom that is the guide, it should be Godly principles. Just because something is done often enough to become a custom doesn't give it value. It used to be the custom of the Aztecs to sacrifice babies to their gods. Was that a "great guide"? Some people here in America think it is an ok custom to abort our innocent babies, is that a "great guide"?
Change this and that and try again. Duis mollis, est non commodo luctus, nisi erat porttitor ligula, eget lacinia odio sem nec elit. Cras mattis consectetur purus sit amet fermentum.