In the next place, if the things which are not seen are formed from invisible seeds, it follows that those which are seen are from visible seeds. Why, then, does no one see them? But whether any one regards the invisible parts which are in man, or the parts which can be touched, and which are visible, who does not see that both parts exist in accordance with design? (8) How, then, can bodies which meet together without design effect anything reasonable? (9) For we see that there is nothing in the whole world which has not in itself very great and wonderful design.