"Now I assert, the spirit and the soul / are held conjoint and form one common nature, / but the captain, so to speak, and lord of the body / is the judgment, which we call the soul or mind. / It sits fixed in the center of the breast. / Here alarm bucks loose, and dread, and round these regions / Gladness caresses.  Here, then, is the mind, the soul. / The other, the spirit, sown broadcast through the body, / obeys and moves to the mind's sway and will. / The mind thinks by itself, joys in itself, / Even when nothing is stirring the spirit or body. / And as when our head or eye is stricken with  / Some trying pain, we're still not torture-crossed / throughout the body, so the mind itself / will grieve or flourish in gladness while the spirit, / spread through the frame, is touched by nothing new. / But when the fear that troubles the mind is more / vehement, we see the spirit in all the members / agree, and the body blanches and beads of sweat / break out all over, the tongue-tied voice cracks, falters, / it's dusk with the eyes, ears ring, limbs buckle and give, / and yes, we see men terrified in mind / crumple — so anyone should easily learn / that the spirit and mind are one, for when spirit is struck / by the force of the mind, it thrusts and hurls the body."—Thank you, Lucretius (ca.99-55 BCE) (and Anthony M. Esolen, editor) for De rerum natura (on the nature of things), Johns Hopkins University Press, 1995, p.95.  Thank you, Chris & Anna Celenza for access to the library from which this book was borrowed.