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.
Moreover, anyone who has watched how the shore is laid bare by the retreat of the sea into itself, and how within a short time it is again covered, will believe that it is in obedience to some hidden law of change that the waves are at one time contracted and driven inwards, at another burst forth and regain their bed with a strong current, since all the while they wax in regular proportion, and come up at their appointed day and hour greater or less, according as the moon, at whose pleasure the ocean flows, draws them.
Let these matters be set aside for discussion at their own proper season, but I, since you do not doubt the existence of providence but complain of it, will on that account more readily reconcile you to gods who are most excellent to excellent men: for indeed the nature of things does not ever permit good to be injured by good.
Between good men and the gods there is a friendship which is brought about by virtue—friendship do I say? nay, rather relationship and likeness, since the good man differs from a god in time alone, being his pupil and rival and true offspring, whom his glorious parent trains more severely than other men, insisting sternly on virtuous conduct, just as strict fathers do.
When therefore you see men who are good and acceptable to the gods toiling, sweating, painfully struggling upwards, while bad men run riot and are steeped in pleasures, reflect that modesty pleases us in our sons, and forwardness in our house-born slave-boys; that the former are held in check by a somewhat stern rule, whereas the boldness of the latter is encouraged.
Be thou sure that God acts in like manner: He does not pet the good man: He tries him, hardens him, and fits him for Himself.