Tertullian, de Spectaculis, c. 30. In order to ascertain the degree of authority which the zealous African had acquired, it may be sufficient to allege the testimony of Cyprian, the doctor and guide of all the western churches (see Prudent. Hym. xiii. 100). As often as he applied himself to his daily study of the writings of Tertullian, he was accustomed to say "Da mihi magistrum; Give me my master." (Hieronym. de Viris Illustribus tom. i. p. 284 [c. 53, tom. ii. p. 878, ed. Vallars.]).