It was a maxim with him, for which he is reproved by Plato, "That to be good is hard." His favourite precept was, "Know occasion:" and this he amplified in another (if rightly attributed to him), "To foresee and prevent dangers is the province of the wise--to direct them when they come, of the brave." XV. Of Solon, the greatest of the seven, I shall hereafter speak at length. I pass now to Thales (born B. C. 639);--the founder of philosophy, in its scientific sense--the speculative in contradistinction to the moral: Although an ardent republican, Thales alone, of the seven sages, appears to have led a private and studious life. He travelled, into Crete, Asia, and at a later period into Egypt. According to Laertius, Egypt taught him geometry. He is supposed to have derived his astrological notions from Phoenicia. But this he might easily have done without visiting the Phoenician states. Returning to Miletus, he obtained his title of Wise [190]. Much learning has been exhausted upon his doctrines to very little purpose. They were of small value, save as they led to the most valuable of all philosophies--that of experiment. They were not new probably even in Greece [191], and of their utility the following brief sketch will enable the reader to judge for himself. He maintained that water, or rather humidity, was the origin of all things, though he allowed mind or intellect (nous) to be the impelling principle. And one of his arguments in favour of humidity, as rendered to us by Plutarch and Stobaeus, is pretty nearly as follows: --"Because fire, even in the sun and the stars, is nourished by vapours proceeding from humidity,--and therefore the whole world consists of the same." Of the world, he supposed the whole to be animated by, and full of, the Divinity--its Creator--that in it was no vacuum--that matter was fluid and variable. [192]