The teaching that essentially none of us are able to truly cognize anything fundamentally because we are in a loop of our sense perceptions is a humbling one. But it brings home that essentially, there is no objective reality—only our own subjective sense of reality. Even if you believe in a objective reality, there is no way to leave your senses to prove otherwise! No one can experience “outside” of themselves. And we can be sure these experiences are not permanent so in my opinion, it’s sketchy to call it reality at all. Hence, I always love to use the word, “dream.” We all exists in our own subjective dreams.
Here is a Buddhist way and a physicists way of saying this teaching selected from the book, The Quantum and the Lotus by Matthieu Ricard.
“Eyes, ears, and nose are not valid cognizers. Likewise the tongue and the body are not valid cognizers. If these sense faculties are valid cognizers, what could the sublime path do for anyone?” -The Buddha
“Reality is what we take to be true. What we take to be true is what we believe. What we believe is based on our perceptions. What we perceive depends upon what we look for. What we look for depends on what we think. What we think depends on what we perceive. What we perceive determines what we believe. What we believe determines what we take to be true. What we take to be true is our reality.” – Physicist David Bohm