I shall, therefore, treat of the nature and strength of the emotions according to the same method, as I employed heretofore in my investigations concerning God and the mind. I shall consider human actions and desires in exactly the same manner, as though I were concerned with lines, planes, and solids.
Honela, bada, Afektuen izaeraz eta indarrez ihardungo dut eta, halaber, horien gain Izpirituak duen ahalmenaz, Jainkoari eta izpirituari buruz aurreko zatietan erabili dudan Metodo berdinarekin, eta giza ekintzak eta gurariak kontsideratuko ditut lerroez, gainazalez edo gorputzez ari bagina bezala.