"Whenever the operations of the soul are well performed, and the soul acts with entire liberty, the blood flows with moderate velocity; on the contrary, it circulates with great rapidity in frenzies, in strong agitations of the mind, and when the lamp of wisdom is extinct."
— Marat, Jean-Paul (1743-1793)
A Philosophical Essay on Man: Being an Attempt to Investigate the Principles and Laws of the Reciprocal Influence of the Soul on the Body, 2 vols. (London: Printed for J. Ridley; and T. Payne, 1773) <Link to Vol. II in ECCO_TCP>