Note 14 — Chapter I · THE STOIC SCHOOL OF PHILOSOPHY.

Cleanthes said that it was τύπωσις ἐν ψυχῇ, an impression made on the soul, similar to that of a stamp on molten wax, τοῦ κηροῦ τύπωσιν: while Chrysippus said it was a ἑτερείωσις, or modification of the soul itself.