Plato (427–347 BC), referring to ideas of his teacher Socrates (469–399 BC) and developing them, has overcome his thesis about impossibility of teaching moral virtue (Meno and partly Protagoras), and agreed with the “wisest of the Greek” on the part that giving a man true knowledge which lies at the heart of the virtue itself, during the process of traditional teaching is impossible. However in Theaetetus he showed that according to his point of view teaching virtue is addressing a human soul and helping to develop inner activism of a student, aimed at making the soul “remember” and actualize the true knowledge which has already been inside of it. In other words, teaching virtue according to Plato is maintaining independent moving of a student to it through actualizing already existing experience of a human.