ABSTRACT This article maintains that in Stoicism physics depends epistemologically on ethics because the theological theses (which are part of stoic physics) about that the gods are beneficial and care about human beings depend on knowledge of the ethical realm of philosophy to be sustained or established forcefully. It is possible appreciate that dependence in the response Stoics would have given to the criticism of other philosophical schools to some of the Stoic theological theses. This is not a minor issue, (...) because the question about whether there are foundational relationships between ethics and physics or not depends on it. The proposal in this article intends to support the negative answer to this question under discussion in contemporary studies on Stoicism. (shrink)