[69] And the expression, "to the voice," is not inconsiderately or incorrectly used in preference to saying—he listened to Sarah speaking. For it is the especial character of a learner to listen to the voice and words of his teacher; for by these alone is he taught. But he who acquires what is good by practise, and solitary meditation, and not by instruction, does not attend to what is said but rather to those who say it, imitating the lives of those men in their actions which are in each particular irreproachable.