ARTICLE IV

Avicenna, De anima, V, 3 (24r).

Boethius, De consolatione philosophiae, V, metro 3 (PL 63:845).

Aristotle, De anima, III, 4 (430a 1).

Ibid., III, 4 (429b 29 ff.).

Anonymous, Liber de causis, IX (BA 173).

St. Augustine, De genesi ad litteram, VIII, 8 (PL 34:379); 9 (PL 34:380).

Pseudo-Dionysius, De caelesti hierarchia, VII (PG 3:210).

St. Augustine, De divinatione daemonum, V (PL 40:586).

St. Augustine, De civitate Dei, XIV, 10 (PL 41:417).

This difficulty, though not in the manuscripts, is given thus by the Leonine editors to correspond to the new numbering of the answers. See below.

St. Augustine, De genesi ad litteram, VIII, 27 (PL 34:392).

Ibid., V, 5 (PL 34:326).

In q. 18, a. 1.