While there is frequent allusion to the Stoics in the poem, there is no direct mention either of them or of their chief teachers, Zeno, Chrysippus, or cleanthes.
"The Roman Poets of the Republic"
W. Y. Sellar
In the first place they are dunces, though you find their houses full of plaster figures of Chrysippus: for a man of this sort is not fully equipped until he buys a likeness of Aristotle or Pittacus, and bids a shelf take care of original portraits of cleanthes.
"The Care of Books"
John Willis Clark
This was afterwards introduced by Philocles of Egypt with considerable pains, and also by cleanthes and Ardices of Corinth and by Telephanes of Sicyon.
"The Lives of the Painters, Sculptors & Architects, Volume 1 (of 8)"
Giorgio Vasari