"Sometimes also in the merely civil government, there be more than one soul: as when the power of levying money, (which is the nutritive faculty,) has depended on a general assembly; the power of conduct and command, (which is the motive faculty,) on one man; and the power of making laws, (which is the rational faculty,) on the accidental consent, not only of those two, but also of a third; this endangereth the commonwealth, sometimes for want of consent to good laws; but most often for want of such nourishment, as is necessary to life, and motion."
— Hobbes, Thomas (1588-1679)
Text from Past Masters, drawn from the 1843 Molesworth edition.
See also Leviathan, or, The Matter, Forme, and Power of a Common Wealth, Ecclesiasticall and Civil by Thomas Hobbes (London: Printed for Andrew Crooke, 1651). <Link to EEBO-TCP>
Reading Thomas Hobbes, Leviathan, ed. Edwin Curley (Indianapolis and Cambridge: Hackett Publishing, 1994).