The formula 'the elements of logos' in the Zeno quotation by Epictetus at Arrian, Diss. 4.8.12 need not, pace e.g. von Arnim, pertain to the parts of speech, but more probably means the elements i.e. primary theorems of philosophical theory, or doctrine. Theory moreover should become internalized to the soul and 'lived': philosophy is also the so-called 'art of life'. These theorems are to be distinguished but should reciprocally entail each other. Philosophy according to Zeno is both tripartite and one, and tripartite especially in that its parts (and subparts) cannot be transferred simultaneously: of necessity these have to taught and learned one after the other.