XVIII. Those, who are under the dominion of ambition and avarice, invert the order and nature of things; placing the end in the means of attaining it. They desire more, only to hoard more, and to have more power, merely for the sake of domineering more. But how does it fare with such people? why that they are always unhappy; because the hunger and thirst of their desires is never appeased, but either remains constantly in the same state, or else proceeds to acquire fresh augmentations. The weight of honour and riches has the same effect on the human heart, which weights have upon a clock; the greater they are, they cause the machine to be more violently agitated, and to move with greater impetuosity. The passions go on to display a succession of cavities, as the first openings are continued to be filled up. At first, the thirst can be satisfied with a fountain; after having grown into a dropsy, it requires a river to satisfy it, and after having swallowed the river, it craves the ocean: _Ecce absorbebit fluvium, & non mirabitur._ Alexander in his first schemes of ambition, had nothing further in view, than the destruction of Thebes, and the conquest of Thrace and Illyricum; having compleated this, he took it into his head to subdue the Asiatic Empire, and when he was in quiet possession of that, upon hearing a philosopher say, there were more worlds, he wept with grief, because that being the case, his ambition could not be satiated with the conquest of one only; which caused Juvenal to sing as follows: _Unus Pellæo juveni non sufficit orbis._