The principle we call self-love never seeks anything external for the sake of the thing, but only as a means of happiness or good: particular affections rest in the external things themselves. – Joseph Butler
Love of our neighbour, then, has just the same respect to, is no more distant from, self-love, than hatred of our neighbour, or than love or hatred of anything else. – Joseph Butler
The private interest of the individual would not be sufficiently provided for by reasonable and cool self-love alone therefore the appetites and passions are placed within as a guard and further security, without which it would not be taken due care of. – Joseph Butler
Happiness or satisfaction consists only in the enjoyment of those objects which are by nature suited to our several particular appetites, passions, and affections. – Joseph Butler