Thank you for the summary, o phile Nikolaos.

May I aks how you perceived the triade logic, epistemology and cosmology?

I thought it was logic, ethics and physics. Logic is necessary to live ethically in a physic world. Something in that vein. You put it as In addition, the life of virtue is the life in agreement with nature. And Zenon himself said something like: Logic is a fence shielding a garden in which are the trees of Physics and the fruit of Ethics.

In Stoicism logic is divided in two parts: rhetorics and dialectics, the latter into epistemologie and and grammar. The stoics were aware of the fact, that language transports a lot of information in the form of unspoken premises. Thus language was analyzed quite thoroughly.
And mending the fence means to be astute in logics.