Authors:

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.

Bertrand Russell (2013). “An Inquiry into Meaning and Truth”, p.15, Routledge
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.