In 1993 I took a supervisor class and one of the main concepts that they were teaching was that perception is reality. The whole notion drove me nuts and I railed against them teaching this as fact. Just because somebody perceives something does not mean that it is real people’s perceptions can be jaded or they can be extremely Rosy when neither are necessarily the case.
I didn’t win the debate because the instructors know everything of course. There really was no way to win a debate where I was logically shredding one of the companies’ main precepts.
My understanding of the phrase “Perception is reality” is that people will act on what they perceive to be reality.
We all do it. I perceive that it is cold outside; I dress according to that perception. Another person may perceive that it is a pleasant day and dress for a warm day.
The reality is that it is 38 degrees Fahrenheit. Some perceive it as cold others do not.
I have oversimplified the concept but I am not a philosopher