St. Augutin altered his opinion with regard to the proper treatment of heretics. His pathetic declaration of pity and indulgence for the Manichaeans has been inserted by Mr. Locke (vol. iii. p. 469) among the choice specimens of his common-place book. Another philosopher, the celebrated Bayle (tom. ii. p. 445-496), has refuted, with superfluous diligence and ingenuity, the arguments by which the bishop of Hippo justified, in his old age, the persecution of the Donatists.