About Plutarch: Plutarch is considered today to be a Middle Platonist. Plutarch's surviving works seem to have all been originally written in Koine Greek.
Do not speak of your happiness to one less fortunate than yourself.
I don't need a friend who changes when I change and who nods when I nod; my shadow does that much better.
What we achieve inwardly will change outer reality.
The very spring and root of honesty and virtue lie in good education.
Those who aim at great deeds must also suffer greatly.
It is part of a good man to do great and noble deeds, though he risk everything.
The omission of good is no less reprehensible than the commission of evil.
Let us carefully observe those good qualities wherein our enemies excel us; and endeavor to excel them, by avoiding what is faulty, and imitating what is excellent in them.
To make no mistakes is not in the power of man; but from their errors and mistakes the wise and good learn wisdom for the future.
The mind is not a vessel to be filled but a fire to be kindled.
I would rather excel in the knowledge of what is excellent, than in the extent of my power and possessions.
Painting is silent poetry, and poetry is painting that speaks.
To be ignorant of the lives of the most celebrated men of antiquity is to continue in a state of childhood all our days.
Moral habits, induced by public practices, are far quicker in making their way into men's private lives, than the failings and faults of individuals are in infecting the city at large.
All men whilst they are awake are in one common world: but each of them, when he is asleep, is in a world of his own.
For to err in opinion, though it be not the part of wise men, is at least human.
Silence at the proper season is wisdom, and better than any speech.