[156] Plato, Leges, ix. 873.
[157] Cicero, Tusculanæ quæstiones, i. 34 (83 sq.). Valerius Maximus, viii. 9. Externa 3.
[158] Epicurus, quoted by Seneca, Epistulæ, 26.
[159] See Geiger, op. cit. p. 15 sqq.
[160] Seneca, Epistulæ, 70. See also Idem, De ira, iii. 15; Idem, Consolatia ad Marciam, 20.
[161] Lecky, History of European Morals, i. 214, n. 1.
[162] Seneca, Epistulæ, 70.
[163] Epictetus, Dissertationes, i. 9. 16.
[164] Ibid. i. 24. 20; i. 25. 20 sq.; ii. 16. 37 sqq.; iii. 13. 14; iii. 24. 95 sqq.
[165] Pliny, Historia naturalis, ii. 5 (7).