Translated by Alexander Roberts and James Donaldson.
Chapter I. The Office of the Instructor.
As there are these three things in the case of man, habits, actions, and passions; habits are the department appropriated by hortatory discourse the guide to piety, which, like the ship's keel, is laid beneath for the building up of faith; in which, rejoicing exceedingly, and abjuring our old opinions, through salvation we renew our youth, singing with the hymning prophecy, "How good is God to Israel, to such as are upright in heart!"  All actions, again, are the province of preceptive discourse; while persuasive discourse applies itself to heal the passions. It is, however, one and the self-same word which rescues man from the custom of this world in which he has been reared, and trains him up in the one salvation of faith in God.
When, then, the heavenly guide, the Word, was inviting  men to salvation, the appellation of hortatory was properly applied to Him: his same word was called rousing (the whole from a part). For the whole of piety is hortatory, engendering in the kindred faculty of reason a yearning after true life now and to come. But now, being at once curative and preceptive, following in His own steps, He makes what had been prescribed the subject of persuasion, promising the cure of the passions within us. Let us then designate this Word appropriately by the one name Tutor (or Paedagogue, or Instructor).
 Ps. lxxiii. 1.
 [See Exhortation to the Heathen, cap. xi. p. 203, supra.]
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