“The rottenness of the matter which is the foundation of everything!”
Marcus Aurelius book Meditations
IX, 36
Meditations (c. 121–180 AD), Book IX

Meditations is a series of personal writings by Marcus Aurelius, Roman Emperor from 161 to 180 AD, recording his private notes to himself and ideas on Stoic philosophy.
“The rottenness of the matter which is the foundation of everything!”
Marcus Aurelius book Meditations
IX, 36
Meditations (c. 121–180 AD), Book IX
“No carelessness in your actions. No confusion in your words. No imprecision in your thoughts.”
Marcus Aurelius book Meditations
Hays translation
Be not careless in deeds, nor confused in words, nor rambling in thought.
VIII, 51
Meditations (c. 121–180 AD), Book VIII
“The controlling Intelligence understands its own nature, and what it does, and whereon it works.”
Marcus Aurelius book Meditations
VI, 5
Meditations (c. 121–180 AD), Book VI
Marcus Aurelius book Meditations
The last phrase is quoted in J. D. Salinger's Franny and Zooey as "It loved to happen".
Meditations (c. 121–180 AD), Book X, 21
Original: (el) ῾Ἐρᾷ μὲν ὄμβρου γαῖα, ἐρᾷ δὲ ὁ σεμνὸς αἰθήρ,᾿ ἐρᾷ δὲ ὁ κόσμος ποιῆσαι ὃ ἂν μέλλῃ γίνεσθαι. λέγω οὖν τῷ κόσμῳ ὅτι σοὶ συνερῶ. μήτι δὲ οὕτω κἀκεῖνο λέγεται, ὅτι: φιλεῖ τοῦτο γίνεσθαι;
“If thou canst see sharp, look and judge wisely, says the philosopher.”
Marcus Aurelius book Meditations
VIII, 38
Meditations (c. 121–180 AD), Book VIII
“Give thyself time to learn something new and good, and cease to be whirled around.”
Marcus Aurelius book Meditations
II, 7
Meditations (c. 121–180 AD), Book II
“Blot out vain pomp; check impulse; quench appetite; keep reason under its own control.”
Marcus Aurelius book Meditations
IX, 7
Meditations (c. 121–180 AD), Book IX
“That which comes after ever conforms to that which has gone before.”
Marcus Aurelius book Meditations
IV, 45
Meditations (c. 121–180 AD), Book IV
“Search men's governing principles, and consider the wise, what they shun and what they cleave to.”
Marcus Aurelius book Meditations
IV, 38
Meditations (c. 121–180 AD), Book IV
“It is satisfaction to a man to do the proper works of a man.”
Marcus Aurelius book Meditations
VIII, 26
Meditations (c. 121–180 AD), Book VIII