[84] Didascalicon I, 7 (Migne, PL 176).
[85] Plotinus had said, “Nothing that really is can ever perish” (οὐδὲν ἀπολεῖται τῶν ὄντων), as Dean Inge notes, The Philosophy of Plotinus, 1918, I, 189.
There is also resemblance between the Didascalicon (II, 13) and De eodem et diverso (p. 27, line 7) in their division of music into mundane, human, and instrumental. For this Boethius is very likely the common source.
[86] In Roger Bacon Commemoration Essays, ed. by A. G. Little, Oxford, 1914, pp. 241-84.
[87] Roger Bacon Essays, p. 266.
[88] Quest. nat., cap. 16. For a somewhat similar passage in Augustine see De Genesi ad litteram, VII, 18 (Migne, PL 34, 364).
[89] Ibid., cap. 18.
[90] See above, chapter 5, I, 191.
[91] That is, 78 and 77.
[92] De eodem et diverso, p. 32.