Do not feel certain of anything.
Interpretation
Certainty can be misleading and can limit our understanding and growth.
In this quote, Bertrand Russell emphasizes the importance of embracing uncertainty as a means to foster inquiry and growth. By recognizing that nothing is certain, we open ourselves up to new ideas and perspectives, which enhances our understanding of the world and encourages critical thinking.
In practice
In a discussion about scientific theories, one might quote this to highlight the evolving nature of knowledge.
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.
Some philosophers can't bear to say simple things, like "Suppose a dog bites a man." They feel obliged instead to say, "Suppose a dog d bites a man m at time t," thereby demonstrating their unshakable commitment to logical rigor, even though they don't go on to manipulate any formulae involving d, m, and t.
That a thing is peculiar; is no argument for its being blamable; since the most criminal actions are to a being like man not more unnatural than most of the virtues.
Every possession and every happiness is but lent by chance for an uncertain time, and may therefore be demanded back the next hour.
A dispassionate white sun shone at the summit of the sky. I wanted to hone myself on it till I grew saintly and thin and essential as the blade of a knife.
Our flaws are what makes us human. If we can accept them as part of who we are, they really don't even have to be an issue.
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.
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