“Πάντων χρημάτων μέτρον ἐστὶν ἄνθρωπος, τῶν μὲν ὄντων ὡς ἔστιν, τῶν δὲ οὐκ ὄντων ὡς οὐκ ἔστιν [Pántôn khrēmátôn métron éstin ánthrôpos, tôn mèn όntôn hôs éstin, tôn dè ouk όntôn hôs ouk éstin]” – “The measure of all things is man; of things that are that they are, of things that are not that they are not”, said Protagoras. He who wants to consider Protgoras’ statement should first look for the answer to the preliminary question “what man is?” Therefore, (...) first the answer to this question will be sought for, so that Protagora’s statement be considered from the point of view of those answers, and tested within the scope of two aspects of man’s life – θεωρετικός βίος and πολιτικός βίος. Finally, if Plato’s interpretation of Protagora’s statement as the affirmation of the principle of relativism is accepted, a tentative positioning of relativism and its meaning from the point of view of these two aspects of man’s life, as well as from the point of view of difference between sophism and philosophy will be proposed. At the end it will be suggested that Protagora’s statement could be interpreted differently, and that each of different interpretations can be meaningful from different philosophical positions. (shrink)