"For as in this disease, there is an unnatural spirit, or wind in the head that obstructeth the roots of the nerves, and moving them violently, taketh away the motion which naturally they should have from the power of the soul in the brain, and thereby causeth violent, and irregular motions (which men call convulsions) in the parts; insomuch as he that is seized therewith, falleth down sometimes into the water, and sometimes into the fire, as a man deprived of his senses; so also in the body politic, when the spiritual power, moveth the members of a commonwealth, by the terror of punishments, and hope of rewards (which are the nerves of it,) otherwise than by the civil power (which is the soul of the commonwealth), they ought to be moved; and by strange, and hard words suffocates their understanding, it must needs thereby distract the people, and either overwhelm the commonwealth with oppression, or cast it into the fire of a civil war."
— 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).