Full Idea
What am I to take as the principle of appropriate action and raw material for virtue if I give up nature and what is according to nature?
Gist of Idea
Only nature is available to guide action and virtue
Source
Chrysippus (fragments/reports [c.240 BCE]), quoted by Plutarch - On Common Conceptions 1069e
A Reaction
'Nature' is awfully vague as a guideline, even when we are told nature is rational. I can only make sense of it as 'human nature', which is more Aristotelian than stoic. 'Go with the flow' and 'lay the cards you are dealt' might capture it.
Book Reference
'The Stoics Reader', ed/tr. Inwood,B/Gerson,L.P. [Hackett 2008], p.10