[59] Ibid., pp. 267-8.
[60] Ibid., p. 270.
[61] Cicero, De Fin., III., xvii., 58; Acad., I., x., 37; De Off., I., iii., 8.
[62] De Off., I., vi.
[63] I., viii.
[64] I., xviii-xxiii.
[65] Pyrrh. Hyp., III., 201.
[66] Cic., De Off., III., xxiii., 91.
[67] Cic., De Off., III., xii., 51.
[68] Ibid., xxiii., 89.