Full Idea
If one comes into a gymnasium and sees everything properly arranged and carried on in order, one does not imagine these arrangements to be accidental, but infers that there is someone in command whose orders are obeyed.
Gist of Idea
It is obvious from order that someone is in charge, as when we visit a gymnasium
Source
M. Tullius Cicero (On the Nature of the Gods ('De natura deorum') [c.44 BCE], II.15)
Book Reference
Cicero: 'The Nature of the Gods', ed/tr. McGregor,Horace [Penguin 1972], p.129