It is undesirable to believe a proposition when there is no ground whatever for supposing it true
Interpretation
Believing something without evidence is not a rational position.
This quote from Bertrand Russell emphasizes the importance of evidence in forming beliefs. To accept a proposition as true without any supportive grounds is seen as intellectually irresponsible, suggesting that critical thinking and skepticism are essential in the pursuit of knowledge and understanding.
In practice
In a debate about climate change, one might use this quote to emphasize the need for scientific 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.
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.
It occurred to me that at one point it was like I had two diseases - one was Alzheimer's, and the other was knowing I had Alzheimer's.
The mystery of human destiny is that we are fated, but that we have the freedom to fulfill or not fulfill our fate: realization of our fated destiny depends on us. While inhuman beings like the cockroach realize the entire cycle without going astray because they make no choices.
A pool is, for many of us in the West, a symbol not of affluence but of order, of control over the uncontrollable. A pool is water, made available and useful, and is, as such, infinitely soothing to the western eye.
I wanted to get far away from those who believed in cruelty, so then I went to France, a land of true freedom, democracy, equality and fraternity.
A wide and vague impression exists that so-called Eastern religion is more contemplative, innocuous, and humane than the proselytizing monotheisms of the West. Don't believe a word of this: try asking the children of Indochina who were dumped by their parents for inherited deformities that were attributed to sins in a previous 'life.
Anything that is impractical can be play. It's doing something other than what is necessary to continue living as an animal.
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