Marcus Aurelius
Meditations 10.8
When thou hast assumed these names, good, modest, true, rational, a man of equanimity, and magnanimous, take care that thou dost not change these names; and if thou shouldst lose them, quickly return to them. And remember that the term Rational was intended to signify a discriminating attention to every several thing, and freedom from negligence; and that Equanimity is the voluntary acceptance of the things which are assigned to thee by the common nature; and that Magnanimity is the elevation of the intelligent part above the pleasurable or painful sensations of the flesh, and above that poor thing called fame, and death, and all such things. If, then, thou maintainest thyself in the possession of these names, without desiring to be called by these names by others, thou wilt be another person and wilt enter on another life. For to continue to be such as thou hast hitherto been, and to be torn in pieces and defiled in such a life, is the character of a very stupid man and one over-fond of his life, and like those half-devoured fighters with wild beasts, who though covered with wounds and gore, still intreat to be kept to the following day, though they will be exposed in the same state to the same claws and bites. Therefore fix thyself in the possession of these few names: and if thou art able to abide in them, abide as if thou wast removed to certain islands of the Happy. But if thou shalt perceive that thou fallest out of them and dost not maintain thy hold, go courageously into some nook where thou shalt maintain them, or even depart at once from life, not in passion, but with simplicity and freedom and modesty, after doing this one [laudable] thing at least in thy life, to have gone out of it thus. In order, however to the remembrance of these names, it will greatly help thee if thou rememberest the gods, and that they wish not to be flattered, but wish all reasonable beings to be made like themselves; and if thou rememberest that what does the work of a fig-tree is a fig-tree, and that what does the work of a dog is a dog, and that what does the work of a bee is a bee, and that what does the work of a man is a man.
Marcus Aurelius, Meditations 10.8, translated by George Long
Assuming for thyself the appellations, a good man, a modest man, a truthteller, wise of heart, sympathetic of heart, great of heart, take heed thou be not new-named. And if thou shouldst forfeit these titles, e'en make haste to get back to them. And bear in mind that wise of heart was meant to signify for thee a discerning consideration of every object and a thoroughness of thought; sympathetic of heart, a willing acceptance of all that the Universal Nature allots thee; great of heart an uplifting of our mental part above the motions smooth or rough of the flesh, above the love of empty fame, the fear of death, and all other like things. Only keep thyself entitled to these appellations, not itching to receive them from others, and thou wilt be a new man and enter on a new life. For to be still such as thou hast been till now, and to submit to the rendings and defilements of such a life, is worthy of a man that shews beyond measure a dull senselessness and a clinging to life, and is on a level with the wild-beast fighters that are half-devoured in the arena, who, though a mass of wounds and gore, beg to be kept till the next day, only to be thrown again, torn as they are, to the same teeth and talons.
Take ship then on these few attributes, and if thou canst abide therein, so abide as one who has migrated to some Isles of the Blest. But if thou feelest thyself adrift, and canst not win thy way, betake thyself with a good heart to some nook where thou shalt prevail, or even depart altogether from life, not in wrath but in simplicity, independence, and modesty, having at least done this one thing well in life, that thou hast quitted it thus. Howbeit, to keep these attributes in mind it will assist thee greatly if thou bear the Gods in mind, and that it is not flattery they crave but for all rational things to be conformed to their likeness, and that man should do a man's work, as the fig tree does the work of a fig-tree, the dog of a dog, and the bee of a bee.
Marcus Aurelius, Meditations 10.8, translated by C. R. Haines