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.
Interpretation
Believing without evidence can lead to prejudice and a closed mind.
In this quote, Bertrand Russell emphasizes the dangers of adhering to beliefs regardless of evidence supporting them. Such an attitude fosters hostility towards factual information that contradicts one's preconceived notions, ultimately resulting in a narrow-minded approach to understanding the world.
In practice
In a debate about climate change, one might use this quote to illustrate the importance of being open to evidence.
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.
Extreme hopes are born from extreme misery.
Find more pleasure in intelligent dissent than in passive agreement, for, if you value intelligence as you should, the former implies a deeper agreement than the latter.
To surrender to ignorance and call it God has always been premature, and it remains premature today.
Instead of gambling on the eternal impossibility of the revolution and on the fascist return of a war-machine in general, why not think that a new type of revolution is in the course of becoming possible, and that all kinds of mutating, living machines conduct wars, are combined and trace out a plane of consistance which undermines the plane of organization of the World and the States?
And no, it wasn't shame I now felt, or guilt, but something rarer in my life and stronger than both: remorse. A feeling which is more complicated, curdled, and primeval. Whose chief characteristic is that nothing can be done about it: too much time has passed, too much damage has been done, for amends to be made.
Nothing is so false as human life, nothing so treacherous. God knows no one would have accepted it as a gift, if it had not been given without our knowledge.
In the Universal Declaration of Human Rights (December 1948) in most solemn form, the dignity of a person is acknowledged to all human beings; and as a consequence there is proclaimed, as a fundamental right, the right of free movement in search for truth and in the attainment of moral good and of justice, and also the right to a dignified life.
If it will feed nothing else, it will feed my revenge.
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