Marcus Aurelius Quotes: 400 Quotes on Life, Mortality, and the Importance of Living in the Present Moment

No printed sources exist for this prior to 2009, and this seems to have been an attribution which arose on the internet, as indicated by web searches and rationales provided at "Marcus Aurelius and source checking" at Three Shouts on a Hilltop (14 June 2011) http://threeshoutsonahilltop.blogspot.com/2011/06/marcus-aurelius-and-source-checking.html
This quote may be a paraphrase of Meditations, Book II:
Since it is possible that thou mayest depart from life this very moment, regulate every act and thought accordingly.
But to go away from among men, if there are gods, is not a thing to be afraid of, for the gods will not involve thee in evil;
but if indeed they do not exist, or if they have no concern about human affairs, what is it to me to live in a universe devoid of gods or devoid of Providence?
But Gods there are, undoubtedly, and they regard human affairs; and have put it wholly in our power, that we should not fall into what is truly evil
Misattributed

Love , Life , God , Memory

“In the case of most pains let this remark of Epicurus aid thee, that the pain is neither intolerable nor everlasting, if thou bear in mind that it has its limits, and if thou addest nothing to it in imagination…”

Marcus Aurelius book Meditations

Meditations (c. 121–180 AD), Book VII, 64

Pain , Imagination

“Remember this— that there is a proper dignity and proportion to be observed in the performance of every act of life.”

Marcus Aurelius book Meditations

IV, 32
Meditations (c. 121–180 AD), Book IV

Life

“In the morning, when thou art sluggish at rousing thee, let this thought be present; “I am rising to a man’s work.””

Marcus Aurelius book Meditations

Meditations. v. 1.
Bartlett's Familiar Quotations, 10th ed. (1919)

Art

“On the occasion of every act ask thyself, How is this with respect to me? Shall I repent of it? A little time and I am dead, and all is gone.”

Marcus Aurelius book Meditations

VIII, 2
Meditations (c. 121–180 AD), Book VIII

Time , Dead

“That which makes the man no worse than he was makes his life no worse: it has no power to harm, without or within.”

Marcus Aurelius book Meditations

Source: Meditations (c. 121–180 AD), Book IV, 8

Life

“You want praise from people who kick themselves every fifteen minutes, the approval of people who despise themselves. (Is it a sign of self-respect to regret nearly everything you do?) (Hays translation)”

Marcus Aurelius book Meditations

Source: Meditations (c. 121–180 AD), Book VIII, 53

People

“All those things at which thou wishest to arrive by a circuitous road, thou canst have now, if thou dost not refuse them to thyself.”

Marcus Aurelius book Meditations

Meditations (c. 121–180 AD), Book XII, 1

“If…it be a thing external that causes thy grief, know, that it is not that properly that doth cause it, but thine own conceit and opinion concerning the thing: which thou mayest rid thyself of, when thou wilt.”

Marcus Aurelius book Meditations

VIII, 45
Meditations (c. 121–180 AD), Book VIII

“Let no act be done at haphazard, nor otherwise than according to the finished rules that govern its kind.”

Marcus Aurelius book Meditations

IV, 2
Meditations (c. 121–180 AD), Book IV

“We are all made for mutual assistance, as the feet, the hands, and the eyelids, as the rows of the upper and under teeth, from whence it follows that clashing and opposition is perfectly unnatural.”

Marcus Aurelius book Meditations

II, 1
Meditations (c. 121–180 AD), Book II

“What is divine is full of Providence. Even chance is not divorced from nature, from the inweaving and enfolding of things governed by Providence. Everything proceeds from it.”

Marcus Aurelius book Meditations

Hays translation
All that is from the gods is full of Providence.
II, 3
Meditations (c. 121–180 AD), Book II

Nature , Chance

“Thou sufferest justly: for thou choosest rather to become good to-morrow than to be good to-day.”

Marcus Aurelius book Meditations

VIII, 22
Meditations (c. 121–180 AD), Book VIII

“To a rational being it is the same thing to act according to nature and according to reason.”

Marcus Aurelius book Meditations

VII, 11
Meditations (c. 121–180 AD), Book VII

Nature

“Know the joy of life by piling good deed on good deed until no rift or cranny appears between them.”

Marcus Aurelius book Meditations

τί λοιπὸν ἢ ἀπολαύειν τοῦ ζῆν συνάπτοντα ἄλλο ἐπ ἄλλῳ ἀγαθόν, ὥστε μηδὲ τὸ βραχύτατον διάστημα ἀπολείπειν;
XII, 29
Meditations (c. 121–180 AD), Book XII

Life , Appearance , Joy

“All that happens is as usual and familiar as the rose in spring and the crop in summer.”

Marcus Aurelius book Meditations

IV, 44
Meditations (c. 121–180 AD), Book IV

Spring , Summer

“For thus it is, men of Athens, in truth: wherever a man has placed himself thinking it is the best place for him, or has been placed by a commander, there in my opinion he ought to stay and to abide the hazard, taking nothing into the reckoning, either death or anything else, before the baseness”

Marcus Aurelius book Meditations

of deserting his post
VII, 45
Meditations (c. 121–180 AD), Book VII

Death , Men , Truth , Thinking

“Whatever may happen to thee, it was prepared for thee from all eternity; and the implication of causes was from eternity spinning the thread of thy being, and of that which is incident to it.”

Marcus Aurelius book Meditations

Alternate Translation: Whatever may befall you, it was preordained for you from everlasting.
Source: Meditations (c. 121–180 AD), Book X, 5

“As surgeons keep their instruments and knives always at hand for cases requiring immediate treatment, so shouldst thou have thy thoughts ready to understand things divine and human, remembering in thy every act, even the smallest, how close is the bond that unites the two.”

Marcus Aurelius book Meditations

III, 13
Meditations (c. 121–180 AD), Book III

Understanding

“Nothing can come out of nothing, any more than a thing can go back to nothing.”

Marcus Aurelius book Meditations

Source: Meditations (c. 121–180 AD), Book IV, 4

“Whatever is in any way beautiful hath its source of beauty in itself, and is complete in itself; praise forms no part of it. So it is none the worse nor the better for being praised.”

Marcus Aurelius book Meditations

Variant: That which is really beautiful has no need of anything. (trans. George Long)
Source: Meditations (c. 121–180 AD), Book IV, 20

Beauty , Way , Parting

“Respect the faculty that forms thy judgments.”

Marcus Aurelius book Meditations

III, 9
Meditations (c. 121–180 AD), Book III

“All is ephemeral — fame and the famous as well.”

Marcus Aurelius book Meditations

Πᾶν ἐφήμερον, καὶ τὸ μνημονεῦον καὶ τὸ μνημονευόμενον.
IV, 35
Meditations (c. 121–180 AD), Book IV

“All those [events in history] were such dramas as we see now, only with different actors.”

Marcus Aurelius book Meditations

X, 27
Meditations (c. 121–180 AD), Book X

History

“And virtue they will curse, speaking harsh words.”

Marcus Aurelius book Meditations

XI, 32
Meditations (c. 121–180 AD), Book XI

“A horse at the end of the race…A dog when the hunt is over…A bee with its honey stored…And a human being after helping others. They don't make a fuss about it. They just go on to something else, as the vine looks forward to bearing fruit again in season. We should be like that. Acting almost unconsciously.”

Marcus Aurelius book Meditations

Hays translation
V, 6
Meditations (c. 121–180 AD), Book V

Dogs , Bee , Help , Horse

“No form of Nature is inferior to Art; for the arts merely imitate natural forms.”

Marcus Aurelius book Meditations

Meditations. xi. 10.
Bartlett's Familiar Quotations, 10th ed. (1919)

Art , Nature

“Everything is in a state of metamorphosis. Thou thyself art in everlasting change and in corruption to correspond; so is the whole universe.”

Marcus Aurelius book Meditations

Meditations. ix. 19.
Bartlett's Familiar Quotations, 10th ed. (1919)

Art , Universe , Change

“Rememberest the gods, and that they wish not to be flattered, but wish all reasonable beings to be made like themselves; and… 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 book Meditations

X, 8
Meditations (c. 121–180 AD), Book X

God , Dogs , Tree , Bee

“Love that only which happens to thee and is spun with the thread of thy destiny. For what is more suitable?”

Marcus Aurelius book Meditations

VII, 57
Meditations (c. 121–180 AD), Book VII

Love

“Soon you will have forgotten the world, and soon the world will have forgotten you.”

Marcus Aurelius book Meditations

VII, 21
Meditations (c. 121–180 AD), Book VII

World

“All that is harmony for you, my Universe, is in harmony with me as well. Nothing that comes at the right time for you is too early or too late for me. Everything is fruit to me that your seasons bring, Nature. All things come of you, have their being in you, and return to you.”

Marcus Aurelius book Meditations

Meditations (c. 121–180 AD), Book IV, 23
Original: Πᾶν μοι συναρμόζει ὃ σοὶ εὐάρμοστόν ἐστιν, ὦ κόσμε· οὐδέν μοι πρόωρον οὐδὲ ὄψιμον ὃ σοὶ εὔκαιρον. πᾶν μοι καρπὸς ὃ φέρουσιν αἱ σαὶ ὧραι, ὦ φύσις· ἐκ σοῦ πάντα, ἐν σοὶ πάντα, εἰς σὲ πάντα. ἐκεῖνος μέν φησιν·

Nature , Universe , Time , Season

“From Antisthenes: It is royal to do good and be abused.”

Marcus Aurelius book Meditations

VII, 36
Meditations (c. 121–180 AD), Book VII

“He who fears death either fears to lose all sensation or fears new sensations. In reality, you will either feel nothing at all, and therefore nothing evil, or else, if you can feel any sensations, you will be a new creature, and so will not have ceased to have life.”

Marcus Aurelius book Meditations

VIII, 58
Meditations (c. 121–180 AD), Book VIII

Life , Death , Fear , Feeling

“Think not disdainfully of death, but look on it with favor; for even death is one of the things that Nature wills.”

Marcus Aurelius book Meditations

IX, 3
Meditations (c. 121–180 AD), Book IX

Death , Nature , Thinking

“Death hangs over thee: whilst yet thou livest, whilst thou mayest, be good.”

Marcus Aurelius book Meditations

IV, 14 (trans. Meric Casaubon)
τὸ χρεὼν ἐπήρτηται· ἕως ζῇς, ἕως ἔξεστιν, ἀγαθὸς γενοῦ.
IV, 17 (trans.George Long)
Meditations (c. 121–180 AD), Book IV
Variant: Death hangs over thee. While thou livest, while it is in thy power, be good.

Death

“All things are the same,—familiar in enterprise, momentary in endurance, coarse in substance. All things now are as they were in the day of those whom we have buried.”

Marcus Aurelius book Meditations

IX, 14
Meditations (c. 121–180 AD), Book IX