Testimonia et Fragmenta
Cleanthes
Cleanthes. Stoicorum veterum fragmenta, Vol. 1. von Arnim, Hans Friedrich August, editor. Stuttgart: Teubner, 1903. (1964 printing.)
Arrianus Epict. diss. IV 1, 173. παράδοξα μὲν ἴσως φασὶν οἱ φιλόσοφοι, καθάπερ καὶ ὁ Κλεάνθης ἔλεγεν, οὐ μὴν παράλογα. Cf. Zeno n. 281.