We must add to this, that the man who lives with quiet people is not only improved by their example, but also by the fact that he finds no reason for anger and does not practise his vice: it will, therefore, be his duty to avoid all those who he knows will excite his anger. You ask, who these are: many will bring about the same thing by various means; a proud man will offend you by his disdain, a talkative man by his abuse, an impudent man by his insults, a spiteful man by his malice, a quarrelsome man by his wrangling, a braggart and liar by his vain-gloriousness: you will not endure to be feared by a suspicious man, conquered by an obstinate one, or scorned by an ultra-refined one: Choose straightforward, good-natured, steady people, who will not provoke your wrath, and will bear with it. Those whose dispositions are yielding, polite and suave, will be of even greater service, provided they do not flatter, for excessive obsequiousness irritates bad-tempered men. One of my own friends was a good man indeed, but too prone to anger, and it was as dangerous to flatter him as to curse him. Caelius the orator, it is well known, was the worst-tempered man possible.