CHAP. XIV. AND SUMMARY. 365 to their dispositions; the development of these muscles "being perhaps thus increased,, and the lines or furrows on the face,, due to their habitual contraction, "being thus rendered deeper and more conspicuous. The free expres- sion by outward signs of an emotion intensifies it. On the other hand, the repression, as far as this is possible, of all outward signs softens our emotions.5 He who gives way to violent gestures will increase his rage; he who does not control the signs of fear will experience fear in a greater degree; and he who remains passive when overwhelmed with grief loses his best chance of recovering elasticity of mind. These results follow partly from the intimate relation which exists between almost all the emotions and their outward manifesta- tions; and partly from the direct influence of exertion on the heart, and consequently on the brain. Even the simulation of an emotion tends to arouse it in our minds. Shakespeare, who from his wonderful knowledge of the human mind ought to be an excellent judge, says:— " Is it not monstrous that this player here, But in a fiction, in a dream of passion, Could force his soul so to his own conceit, That, from her working, all his visag-e wann'd; Tears in his eyes, distraction in 's aspect, A broken voice, and his whole function suiting- With forms to his conceit? And all for nothing-! " Hamlet, act ii. sc. 2. We have seen that the study of the theory of ex- pression confirms to a certain limited extent the con- clusion that man is derived from some lower animal form, and supports the belief of the specific or sub- specific unity of the several races; but as far as my judgment serves, such confirmation was hardly needed. B Gratiolet (' Be la Physionomie,' 1865, p. 66) insists on the truth of this conclusion.