Book VI · Chapter 40

Every instrument, tool, vessel, if it does that for which it has been made, is well, and yet he who made it is not there. But in the things which are held together by nature there is within, and there abides in them the power which made them; wherefore the more is it fit to reverence this power, and to think, that, if thou dost live and act according to its will, everything in thee is in conformity to intelligence. And thus also in the universe the things which belong to it are in conformity to intelligence.