Nature is all of space and time and their contents.

Every part of us is natural and returns to Nature when we die. Therefore there is no retribution or reward in a “heaven” or a “hell.”

Value must be sought between the limits of birth and death. There are no external, absolute standards by which we must all abide, but death is certain and we must choose how to spend the time we are given.

There are two feelings: pleasure and pain. “Every animal, as soon as it is born, seeks for pleasure and recoils from pain and so far as possible avoids it.” This capacity is the result of millions of years of evolution.

Different people may feel differently when faced with the same situation. The same person might feel differently about something depending on the time of day, or where they are (or their financial situation or their government or their responsibilities or whatever).

Keep in mind that some pains lead to greater pleasure, and some pleasures to greater pain. Living according to Nature is calculating both short- and long-term pleasure and pain from within our context to determine which set of choices will serve our purpose.

Note that the goal is not “avoiding pain” but “maximizing pleasure,” by which we mean pleasure as ordinarily defined. There are no divisions of pleasure imposed from without; there is no “best” pleasure because pleasure is pleasure. You choose!