In men we various ruling passions find; In women, two almost divide the mind; Those, only fixd, they first or last obey, The love of pleasure and the love of sway. Pope.Moral Essay; to a Lady, Epi. II. Line 207.
Manners with fortunes, humours turn with climes, Tenets with books, and principles with times. Search then the ruling passion: there alone The wild are constant, and the cunning known. Pope.Moral Essays, Epi. I. Line 172.