"I supposed that all the objects ... that had ever entered into my mind when awake, had in them no more truth than the illusions of my dreams. ... whilst I thus wished to think that all was false, it was absolutely necessary that I, who thus thought, should be somewhat; and as I observed ... this truth,
I think, therefore I am"
The symbolic representation of reality from the perspective of one or more observer.
"Would they not be sure to fancy when one of the passers-by spoke that the voice which they heard came from the passing shadow?
No question, he replied.
To them, I said, the truth would be literally nothing but the shadows of the images.
That is certain."
"Observations not only disturb what is to be measured, they produce it."
- Pascual Jordan
“The cosmos is within us. We are made of star-stuff. We are a way for the universe to know itself.”
- Carl Sagan