„But he who neither thinks for himself nor learns from others, is a failure as a man.“
Quelle: Works and Days and Theogony
Ähnliche Zitate

— Ayn Rand Russian-American novelist and philosopher 1905 - 1982
The Ayn Rand Column ‘Introducing Objectivism’

— Julian (emperor) Roman Emperor, philosopher and writer 331 - 363
As quoted in The Works of the Emperor Julian (1923) by Wilmer Cave France Wright, p. 91
General sources

— Joseph Conrad, buch The Shadow Line
Referring to Mr. Burns. Compare to Heart of Darkness' manager: "He was becoming confidential now, but I fancy my unresponsive attitude must have exasperated him at last, for he judged it necessary to inform me he feared neither God nor devil, let alone any mere man. I said I could see that very well..."
The Shadow Line (1915)

— Hesiod, buch Werke und Tage
Original: (el) Οὗτος μὲν πανάριστος, ὃς αὐτὸς πάντα νοήσει,
φρασσάμενος, τά κ᾽ ἔπειτα καὶ ἐς τέλος ᾖσιν ἀμείνω·
ἐσθλὸς δ᾽ αὖ καὶ κεῖνος, ὃς εὖ εἰπόντι πίθηται·
ὃς δέ κε μήτ᾽ αὐτὸς νοέῃ μήτ᾽ ἄλλου ἀκούων
ἐν θυμῷ βάλληται, ὁ δ᾽ αὖτ᾽ ἀχρῄος ἀνήρ.
Quelle: Works and Days (c. 700 BC), line 293.

— Epictetus philosopher from Ancient Greece 50 - 138
5
tr. George Long (1888)
The Enchiridion (c. 135)

— William Hazlitt English writer 1778 - 1830
No. 112
Characteristics, in the manner of Rochefoucauld's Maxims (1823)

„Nor is he the wisest man who never proved himself a fool.“
— Alfred, Lord Tennyson British poet laureate 1809 - 1892
Stanza 124
Locksley Hall Sixty Years After (1886)

„That man is prudent who neither hopes nor fears anything from the uncertain events of the future.“
— Anatole France French writer 1844 - 1924
Il est sage de ne mettre ni crainte, ni espérance dans l’avenir incertain.
L’Étui de nacre: Le Procurateur de Judée http://fr.wikisource.org/wiki/Le_Procurateur_de_Jud%C3%A9e [Mother of Pearl: The Procurator of Judea] (1892)

— John Lancaster Spalding Catholic bishop 1840 - 1916
Quelle: Means and Ends of Education (1895), Chapter 1 "Truth and Love"

— George Granville, 1st Baron Lansdowne 1st Baron Lansdowne 1666 - 1735
Epistle to Mrs. Higgons (1690), line 79; reported in Hoyt's New Cyclopedia Of Practical Quotations (1922), "Contentment", p. 133-36.

— Adam Smith, buch Theorie der ethischen Gefühle
Section III.
The Theory of Moral Sentiments (1759), Part VI

— Ursula K. Le Guin American writer 1929 - 2018
Quelle: Earthsea Books, A Wizard of Earthsea (1968), Chapter 5

— Gautama Buddha philosopher, reformer and the founder of Buddhism -563 - -483 v.Chr
Part VII, Chapter 2: On Killing
Mahayana, Śūraṅgama Sūtra

„A man who, beyond the age of 26, finds himself on a bus can count himself as a failure.“
— Margaret Thatcher British stateswoman and politician 1925 - 2013
Attributed to her in Commons debates, 2003-07-02, column 407 http://www.parliament.the-stationery-office.co.uk/pa/cm200203/cmhansrd/vo030702/debtext/30702-10.htm and Commons debates, 2004-06-15 column 697 http://www.publications.parliament.uk/pa/cm200304/cmhansrd/vo040615/debtext/40615-20.htm#40615-20_spnew1. According to a letter http://www.telegraph.co.uk/core/Content/displayPrintable.jhtml?xml=/opinion/2006/11/02/nosplit/dt0201.xml&site=15&page=0 to the Daily Telegraph by Alistair Cooke on 2 November 2006, this sentiment originated with Loelia Ponsonby, one of the wives of 2nd Duke of Westminster who said "Anybody seen in a bus over the age of 30 has been a failure in life". In a letter http://www.telegraph.co.uk/comment/letters/3633852/Letters-to-the-Daily-Telegraph.html published the next day, also in the Daily Telegraph, Hugo Vickers claims Loelia Ponsonby admitted to him that she had borrowed it from Brian Howard. There is no solid evidence that Margaret Thatcher ever quoted this statement with approval, or indeed shared the sentiment.
Misattributed

— Alexandre Dumas French writer and dramatist, father of the homonym writer and dramatist 1802 - 1870