ἀμείφθη: This form, only here in P., becomes common in later times; perhaps “was moved to answer.” Cf. ἐστρατεύθη (P. 1.51).
οἴσειν: May be an undifferentiated fut., equiv. to a present. But the future = μέλλειν οἴσειν is defensible, “that I am going to show myself the bearer of Cheiron's training.” Cheiron's great lesson, reverence for Zeus, and reverence for one's parents (P. 6.23), is the very lesson which Iason is about to carry out. In restoring Aison he is obeying Zeus.
