As any mature person does.
Living life to the fullest and most moral as it is the only life you have.
Being conscious of this, so that one is dependently moral on the strength of our evolutionary underpinnings of morality and what is set in the society one resides in. A society free of superstition and given over to rationality. One tries to leave the world that is a better place than worrying about a world that isn't.
