We have adopted the reading of Wolf in the text. The reading of the mss. is, “He who desires to learn should desire to learn.” Perhaps the most satisfactory emendation is that of Heumann, who reads φιλομυθεῖν instead of φιλομαθεῖν: “He who desires to learn should also desire to discuss subjects, and hold conversations on them.” In this case, Theophilus most probably borrows his remark from Aristotle, Metaphysic. i. c. 2.