The Refutation of All Heresies: Book I. 3Thales; His Physics and Theology; Founder of Greek Astronomy.

It is said that Thales of Miletus, one of the seven wise men, first attempted to frame a system of natural philosophy. This person said that some such thing as water is the generative principle of the universe, and its end;--for that out of this, solidified and again dissolved, all things consist, and that all things are supported on it; from which also arise both earthquakes and changes of the winds and atmospheric movements, and that all things are both produced and are in a state of flux corresponding with the nature of the primary author of generation;--and that the Deity is that which has neither beginning nor end. This person, having been occupied with an hypothesis and investigation concerning the stars, became the earliest author to the Greeks of this kind of learning. And he, looking towards heaven, alleging that he was carefully examining supernal objects, fell into a well; and a certain maid, by name Thratta, remarked of him derisively, that while intent on beholding things in heaven, he did not know what was at his feet. And he lived about the time of Croesus.