バートランド・ラッセルの名言・警句( Bertrand Russell Quotes )

Bertrand Russell Quotes 366

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.
Source: An Inquiry into Meaning and Truth ,1940, Introduction, p. 15
More info.: https://russell-j.com/cool/IMT_1940.pdf