 [W]hoever looks narrowly into the Affairs of it, will find, that Passion, Humour, Caprice, Zeal, Faction, and a thousand other Springs, which are counter to Self-Interest, have as considerable a part in the Movements of this Machine. There are more Wheels and Counter-Poises in this Engine than are easily imagin’d. ’Tis of too complex a kind, to fall under one simple View, or be explain’d thus briefly in a word or two. The Studiers of this Mechanism must have a very partial Eye, to overlook all other Motions besides [selfishness]. (C 1.115)