You have asked me, Lucilius, why, if the world be ruled by providence, so many evils befall good men? The answer to this would be more conveniently given in the course of this work, after we have proved that providence governs the universe, and that God is amongst us: but, since you wish me to deal with one point apart from the whole, and to answer one replication before the main action has been decided, I will do what is not difficult, and plead the cause of the gods. At the present time it is superfluous to point out that it is not without some guardian that so great a work maintains its position, that the assemblage and movements of the stars do not depend upon accidental impulses, or that objects whose motion is regulated by chance often fall into confusion and soon stumble, whereas this swift and safe movement goes on, governed by eternal law, bearing with it so many things both on sea and land, so many most brilliant lights shining in order in the skies; that this regularity does not belong to matter moving at random, and that particles brought together by chance could not arrange themselves with such art as to make the heaviest weight, that of the earth, remain unmoved, and behold the flight of the heavens as they hasten round it, to make the seas pour into the valleys and so temper the climate of the land, without any sensible increase from the rivers which flow into them, or to cause huge growths to proceed from minute seeds. Even those phenomena which appear to be confused and irregular, I mean showers of rain and clouds, the rush of lightning from the heavens, fire that pours from the riven peaks of mountains, quakings of the trembling earth, and everything else which is produced on earth by the unquiet element in the universe, do not come to pass without reason, though they do so suddenly: but they also have their causes, as also have those things which excite our wonder by the strangeness of their position, such as warm springs amidst the waves of the sea, and new islands that spring up in the wide ocean.