According to Joseph Butler's Fifteen Sermons preached at the Rolls Chapel, there is a specific text within that refers to "Altruism and Self-Love" (1726) Joseph Butler defines self-love as
the effort to control and manage passions so that the individual can live happily -- in virtue rather than in vice
...from what appears, there is no Ground to assert that those Principles in the Nature of Man... are more generally or in a greater Degree violated, than those, which most directly lead us to promote our own private Good and Happiness.
"a person who is benevolent will help others to live happily. Whether... arising from self-love or...from benevolence, virtuous actions are natural behavior".