Both our senses and our passions are a supply to the imperfection of our nature; thus they show that we are such sort of creatures as to stand in need of those helps which higher orders of creatures do not.
Compassion is a call, a demand of nature, to relieve the unhappy as hunger is a natural call for food.
Happiness or satisfaction consists only in the enjoyment of those objects which are by nature suited to our several particular appetites, passions, and affections.
Man may act according to that principle or inclination which for the present happens to be strongest, and yet act in a way disproportionate to, and violate his real proper nature.
Self-love then does not constitute THIS or THAT to be our interest or good; but, our interest or good being constituted by nature and supposed, self-love only puts us upon obtaining and securing it.
The sum of the whole is plainly this: The nature of man considered in his single capacity, and with respect only to the present world, is adapted and leads him to attain the greatest happiness he can for himself in the present world.
Thus self-love as one part of human nature, and the several particular principles as the other part, are, themselves, their objects and ends, stated and shown.