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A long habit of not thinking a thing wrong, gives it a superficial appearance of being right.
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“A long habit of not thinking a thing wrong, gives it a superficial appearance of being right.”

Thomas Paine

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Source
Common Sense
Date
1776
Meaning

Meaning of “A long habit of not thinking a thing…”

Custom can disguise error by making the familiar feel legitimate; critical judgment requires re-examining practices that have escaped scrutiny through repetition.

Source context

Where does it come from?

Common Sense (1776), Introduction. The represented opening sentence is verified in Project Gutenberg #147 and the validated scan-backed Wikisource transcription; Paine argues that familiarity can make a wrong practice appear right before public argument unsettles the custom.

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Our errors are surely not such awfully solemn things.
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“Our errors are surely not such awfully solemn things.”

William James · The Will to Believe, and Other Essays in Popular Philosophy · 1897
Meaning & context

James resists treating every possible intellectual mistake as catastrophic, because an excessive fear of error can itself prevent inquiry, experience and the possibility of gaining truth.

Source details

The Will to Believe, essay “The Will to Believe”; Project Gutenberg #26659. James is contrasting the risk of being mistaken with the cost of refusing every uncertain intellectual venture.

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If a man will begin with certainties, he shall end in doubts; but if he will be content to begin with doubts, he shall end in certainties.
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“If a man will begin with certainties, he shall end in doubts; but if he will be content to begin with doubts, he shall end in certainties.”

Francis Bacon · The Advancement of Learning · 1605
Meaning & context

Intellectual confidence can be improved by beginning with questions rather than pretending certainty too early.

Source details

The Advancement of Learning, First Book, Project Gutenberg #5500, transcribed from the 1893 Cassell & Company edition. Bacon contrasts impatience of doubt with mature suspension of judgment and then sets out two ways of contemplation before saying that beginning with certainties ends in doubts while beginning with doubts can end in certainties. It remains early-modern epistemological argument rather than a modern experimental rule for scientific method.

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Culture is then properly described not as having its origin in curiosity, but as having its origin in the love of perfection.
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“Culture is then properly described not as having its origin in curiosity, but as having its origin in the love of perfection.”

Matthew Arnold · Culture and Anarchy · 1869
Meaning & context

Curiosity becomes more than collecting information when it is directed toward fuller development, better judgment, and a serious desire to improve understanding.

Source details

Culture and Anarchy; Arnold distinguishes idle curiosity from the pursuit of intellectual and moral perfection.

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The service of philosophy, of speculative culture, towards the human spirit is to rouse, to startle it into sharp and eager observation.
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“The service of philosophy, of speculative culture, towards the human spirit is to rouse, to startle it into sharp and eager observation.”

Walter Pater · The Renaissance: Studies in Art and Poetry · 1873
Meaning & context

Pater values philosophy for sharpening attention: its practical intellectual service is to make perception more alert rather than allowing experience to pass unnoticed through habit.

Source details

The Renaissance, Conclusion; Project Gutenberg #2398. The line belongs to Pater’s historically controversial conclusion on experience and culture.

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He who knows only his own side of the case, knows little of that.
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“He who knows only his own side of the case, knows little of that.”

John Stuart Mill · On Liberty · 1859
Meaning & context

Understanding a position requires serious contact with competing arguments; familiarity with only one side can produce confidence without real comprehension.

Source details

On Liberty, Chapter 2; Mill argues for open discussion because opposing views expose weaknesses and sharpen understanding.

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