I. All life is priceless;
II. Never intentionally (or recklessly) soil the space you share with others;
III. Unless you’re unable, always try to carry a little more than your bucket will hold;
IV. Unless it brings harm to others, enjoy life while you can.
So, in other words, without a damn good reason, don’t go out of your way to make it bad for anyone else while you’re here. DR Wolfe)