"Thou must also keep in mind that of desires some are natural, and some are groundless; and that of the natural some are necessary as well as natural, and some are natural only. And of the necessary desires, some are necessary if we are to be happy, and some if the body is to remain unperturbed, and some if we are even to live. By the clear and certain understanding of these things we learn to make every preference and aversion, so that the body may have health and the soul tranquillity, seeing that this is the sum and end of a blessed life." "Cheerful poverty is an honourable thing." "Great wealth is but poverty when matched with the law of nature." "If any one thinks his own not to be most ample, he may become lord of the whole world, and will yet be wretched." "Fortune but slightly crosses the wise man's path." "If thou wilt make a man happy, add not unto his riches, but take away from his desires." "And since pleasure is our first and native good, for that reason we do not choose every pleasure whatsoever, but oftentimes pass over many pleasures when a greater annoyance ensues from them. And oftentimes we consider pains superior to pleasures, and submit to the pain for a long time, when it is attended for us with a greater pleasure. All pleasure, therefore, because of its kinship with our nature, is a good, but it is not in all cases our choice, even as every pain is an evil, though pain is not always, and in every case, to be shunned." "It is, however, by measuring one against another, and by looking at the conveniences and inconveniences, that all these things must be judged. Sometimes we treat the good as an evil, and the evil, on the contrary, as a good; and we regard independence of outward goods as a great good, not so as in all cases to use little, but so as to be contented with little, if we have not much, being thoroughly persuaded that they have the sweetest enjoyment of luxury who stand least in need of it, and that whatever is natural is easily procured, and only the vain and worthless hard to win. Plain fare gives as much pleasure as a costly diet, when once the pain due to want is removed; and bread and water confer the highest pleasure when they are brought to hungry lips. To habituate self, therefore, to plain and inexpensive diet gives all that is needed for health, and enables a man to meet the necessary requirements of life without shrinking, and it places us in a better frame when we approach at intervals a costly fare, and renders us fearless of fortune."