The word ἀταραξία means imperturbability, that is, the lack of disturbance (privative α + ταραχή = disturbance) in the soul. This term has its roots in ancient Greek pagan thought and indicates an utmost good that is utterly crucial for obtaining the kind of happiness to which the continuous exercise of philosophy must lead. It is above all in the field of Hellenistic philosophy (Hellenism and Christianity), and especially in Ep…