Source: A Theory of Justice (1971; 1975; 1999), Chapter III, Section 26, pg. 151
“It is when fortune is the most propitious that she is least to be trusted.”
Book XXX, sec. 30
History of Rome
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Livy 70
Roman historian -59–17 BCRelated quotes

Fortunate Fool.
Song lyrics, Brushfire Fairytales (2001)
“When Fortune flatters, she does it to betray.”
Fortuna cum blanditur, captatum venit.
Maxim 277
Sentences
“Though Fortune now be smiling, it behoves
To look ahead, nor e'er to trust in Fortune.”
Fabulae Incertae, Fragment 42.

“When Fortune smiles, I smile to think
How quickly she will frown.”
Source: Content and Rich, Line 63; p. 59.

“For true it is, good oft befalls us when we least expect it. And true it is, that when we trust in hope, we’re often disappointed.”
Nam multa praeter spem, scio, multis bona evenisse. At ego etiam qui speraverint, spem decepisse multos.
Rudens, Act II, scene 3, line 69
Rudens (The Rope)

“Fortune blinds men when she does not wish them to withstand the violence of her onslaughts.”
Book V, sec. 37
History of Rome
“Literature is most social when it is least social.”
Source: Fiction Sets You Free: Literature, Liberty and Western Culture (2007), p. 62

“Promise is most given when the least is said.”
Musæus of Hero and Leander; reported in Bartlett's Familiar Quotations, 10th ed. (1919).

“To Fortune's forelock Charles knew how to cling
When favourable to him her face she showed.”
Che ben pigliar nel crin la buona sorte
Carlo sapea, quando volgea la faccia.
Canto XVIII, stanza 161 (tr. B. Reynolds)
Orlando Furioso (1532)