Sec. X. But since, as Simonides says, "all larks must have their crests,"[533] and every man's nature contains in it pugnacity and jealousy and envy, which last is, as Pindar says, "the companion of empty-headed men," one might get considerable advantage by purging oneself of those passions against enemies, and by diverting them, like sewers, as far as possible from companions and friends.[534] And this it seems the statesmanlike Onomademus had remarked, for being on the victorious side in a disturbance at Chios, he urged his party not to expel all of the different faction, but to leave some, "in order," he said, "that we may not begin to quarrel with our friends, when we have got entirely rid of our enemies." So too our expending these passions entirely on our enemies will give less trouble to our friends. For it ought not to be, as Hesiod[535] says, that "potter envies potter, and singer envies singer, and neighbour neighbour," and cousin cousin, and brother brother, "if hastening to get rich" and enjoying prosperity. But if there is no other way to get rid of strife and envy and quarrels, accustom yourself to be vexed at your enemies' good fortune, and sharpen and accentuate on them your acerbity. For as judicious gardeners think they produce finer roses and violets by planting alongside of them garlic and onions, that any bitter or strong elements may be transferred to them, so your enemy's getting and attracting your envy and malignity will render you kinder and more agreeable to your prosperous friends. And so let us be rivals of our enemies for glory or office or righteous gain, not only being vexed if they get ahead of us, but also carefully observing all the steps by which they get ahead, and trying to outdo them in industry, and hard work, and soberness, and prudence; as Themistocles said Miltiades' victory at Marathon would not let him sleep.[536] For he who thinks his enemy gets before him in offices, or advocacies, or state affairs, or in favour with his friends or great men, if from action and emulation he sinks into envy and despondency, makes his life become idle and inoperative. But he who is not blinded by hate,[537] but a discerning spectator of life and character and words and deeds, will perceive that most of what he envies comes to those who have them from diligence and prudence and good actions, and exerting himself in the same direction he will increase his love of what is honourable and noble, and will eradicate his vanity and sloth.