The essence of vedanta & dharma.
Just as fire is hot, a fact of experience we all share, reality is as such based on verifiable fact that can be proven by not math equations, nor words but simply by the self evidency of experience, especially common shared experience. The only problem is there will always be some people who lie and are in a great deal of illusion and choose to deny reality, but that has absolutely zero effect on reality. Just as the buddha taught his teachings wandering about, there would be people who didn't recieve that so well, but it had no impact on reality itself.
We all share our common experience of the underlying awareness behind matter, this reality which is one without a second, pure spirit, not possible to divide by knife, fire nor other powers, our essential nature and the nature of everything is the ultimate dominator and master of all, and is not subject to change, but is the one whom change is subject to. We are all just believing in the illusion of being seperate and caught in time. But reality always stays the same. Beyond space and time, pure consciousness, infinite reality is there, stainless and truthful, present. And it's the only thing real. Reality is only one & infinite 🌙