The defining features of the creative power of the universe are its inexhaustibility and its rationality. Stoicism offers the obvious proof for this: Consider only the lawfulness of the cosmos itself --
In Stoic teaching, then, particularly later Stoic teaching, knowledge of this kind of divine influence is one of the preconceptions that a rational being has. In other words, a rational being, recognizing the orderliness and lawfulness of the cosmos, must match that up, without further deliberation, with the notion of some rational agency behind it, recognizing that nothing of this sort occurs accidentally.
Source credit: Daniel Robinson, Cambridge University