The fact that an opinion has been widely held is no evidence whatever that it is not utterly absurd; indeed in view of the silliness of the majority of mankind, a widely spread belief is more likely to be foolish than sensible.
Interpretation
Popularity does not equate to truth; commonly held beliefs can often be foolish.
In this quote, Bertrand Russell emphasizes that just because a belief is widely accepted does not mean it is valid or sensible. He critiques the tendency of people to accept popular opinions without questioning their validity, suggesting that the majority often lacks wisdom, thus making commonly held beliefs potentially misguided or absurd.
In practice
In a debate about climate change, you could use this quote to challenge popular misconceptions.
St. Paul introduced an entirely novel view of marriage, that it existed primarily to prevent the sin of fornication. It is just as if one were to maintain that the sole reason for baking bread is to prevent people from stealing cake.
Freedom comes only to those who no longer ask of life that it shall yield them any of those personal goods that are subject to the mutations of time.
Of these austerer virtues the love of truth is the chief, and in mathematics, more than elsewhere, the love of truth may find encouragement for waning faith. Every great study is not only an end in itself, but also a means of creating and sustaining a lofty habit of mind; and this purpose should be kept always in view throughout the teaching and learning of mathematics.
At all times, except when a monarch could enforce his will, war has been facilitated by the fact that vigorous males, confident of victory, enjoyed it, while their females admired them for their prowess.
Moreover, the attitude that one ought to believe such and such a proposition, independently of the question whether there is evidence in its favor, is an attitude which produces hostility to evidence and causes us to close our minds to every fact that does not suit our prejudices.
Extreme hopes are born from extreme misery.
We will neglect our cities to our peril, for in neglecting them we neglect the nation.
Please pray with me for everyone in Sri Lanka and the Philippines as I begin my trip.
Humans treat animals as things that exist as means to human ends. That's morally wrong. Sexism promotes the idea that women are things that exist as means to the ends of men. That's morally wrong. We need to stop treating all persons - whether human or nonhuman - as things.
Life is God's novel. Let him write it.
Never before has the seductive market way of life held such sway in nearly every sphere of American life. This marketing way of life promotes addictions to stimulation and obsessions with comfort and convenience ... centered primarily around bodily pleasures and status rankings. ... The common denominator is a rugged and ragged individualism and rapacious hedonism in quest of a perennial "high" in body and mind.
The world is a reflection of who we are and if we don't like the reflection, it doesn't really help to break the mirror.
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