The observer, when he seems to himself to be observing a stone, is really, if physics is to be believed, observing the effects of the stone upon himself.
Interpretation
This quote suggests that our observations are influenced by our own perception rather than being purely objective.
Bertrand Russell's quote underscores the philosophical idea that perception is subjective. When we observe objects, such as a stone, we are not just seeing the stone as it is; instead, we are experiencing the impact of that stone on our own consciousness. This implies that our understanding of reality is shaped by our own sensory experiences and mental interpretations.
In practice
In a philosophy class discussion about perception and reality.
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.
The character of God is today, and always will be, exactly what it was in Bible times.
A fascist is one whose lust for money or power is combined with such an intensity of intolerance toward those of other races, parties, classes, religions, cultures, regions or nations as to make him ruthless in his use of deceit or violence to attain his ends.
Closure is a greasy little word which, moreover, describes a nonexistent condition. The truth, Venus, is that nobody gets over anything.
As far as social-economic theory is concerned, I am still a Marxist
Be The Peace You Wish To See In The World!
Philosophy is tested and characterised by the way in which it appropriates its history.
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