Pior, St., story of, ii. 129 Pirates, destruction of, by Pompey, i. 234 Pity, a form of self-love, according to some Utilitarians, i. 9, 10, _note_. Adam Smith’s theory, 10, _note_. Seneca’s distinction between it and clemency, 189. Altar to Pity at Athens, 228. History of Marcus Aurelius’ altar to Beneficentia at Rome, 228, _note_ Plato, his admission of the practice of abortion, i. 92. Basis of his moral system, 105. Cause of the banishment of the poets from his republic, 161, 162. His theory that vice is to virtue what disease is to health, 179, and _note_. Reason for his advocacy of community of wives, 200. His condemnation of suicide, 212, and _note_. His remarks on universal brotherhood, 241. His inculcation of the practice of self-examination, 248 Platonic school, its ideal, i. 322 Platonists, their more or less pantheistic conception of the Deity, i. 163. Practical nature of their philosophy, 329. The Platonic ethics ascendant in Rome, 331 Pleasure the only good, according to the Utilitarians, i. 7. Illustrations of the distinction between the higher and lower parts of our nature in our pleasures, 83-85. Pleasures of a civilised compared with those of a semi-civilised society, 86. Comparison of mental and physical pleasures, 87, 88. Distinction in kind of pleasure, and its importance in morals, 89-91. Neglected or denied by Utilitarian writers, 89, _note_ Pliny, the elder, on the probable happiness of the lower animals, i. 87, _note_. On the Deity, 164. On astrology, 171, and _note_, 164, _note_. His disbelief in the immortality of the soul, 182. His advocacy of suicide, 215. Never mentions Christianity, 336. His opinion of earthquakes, 369. And of comets, 369. His facility of belief, 370. His denunciation of finger rings, ii. 148 Pliny, the younger, his desire for posthumous reputation, i. 185, _note_. His picture of the ideal of Stoicism, 186. His letter to Trajan respecting the Christians, 437. His benevolence, 242; ii. 77 Plotinus, his condemnation of suicide, i. 214. His philosophy, 330 Plutarch, his defence of the bad poetry of the oracles, 165, _note_. His mode of moral teaching, 175. Basis of his belief in the immortality of the soul, 204. On superstitious fear of death, 206. His letter on the death of his little daughter, 242. May justly be regarded as the leader of the eclectic school, 243. His philosophy and works compared with those of Seneca, 243. His treatise on “The Signs of Moral Progress,” 249. Compared and contrasted with Marcus Aurelius, 253. How he regarded the games of the arena, 286. His defence of the ancient creeds, 322. Practical nature of his philosophy, 329. Never mentions Christianity, 336. His remarks on the domestic system of the ancients, 419. On kindness to animals, ii. 165, 166. His picture of Greek married life, 289