Agency Quote by Niels Bohr

Where conscious subjectivity is concerned, there is no distinction between the observation and the thing observed

— John Searle

No phenomenon is a real phenomenon until it is an observed phenomenon.

— John Archibald Wheeler

The complexity of the connection between the world of perception and the world of physics does not preclude that such a connection can be…

— Max Horkheimer

“You might say, "However, since the seeming is also nothing different, it is not the sphere of cognition. [Ultimately,] this is very true indeed.…

— Karl Brunnholzl

“There is no picture- or theory-independent concept of reality.”

— Stephen Hawking

Anything whose presence or absence makes no discernible difference is no essential part of the whole.

— Aristotle

It is possible to interpret without observing, but not to observe without interpreting.

— Mason Cooley

There is no reality, only perception.

— Phil McGraw

There is no pure, disinterested, theory-free observation,

— Karl Popper

There is no unique picture of reality.

— Stephen Hawking

Life cannot be seen by an unmoved spectator.

— Mary Wollstonecraft

Reality is what one does not perceive when one perceives it.

— Niklas Luhmann