We can hardly say that the universe is certainly as it appears. If we assume that the red shift is due to speed of expansion of the universe, which is a very recent idea on the cosmological time scale, not even a century old, then we see this. Not much over a century ago meteorites did not come from outer space. Less than a century ago there were no galaxies. Everything was inside the Milky Way. Sometime between 1922 and 1960 the universe acquired galaxies and grew to a billion light years radius with the earth and sun four billion years old, presenting a problem that Einstein indicated needed attention evenwhile he promulgated his Relativity as the explanation of the illusions of EM phenomena. Now the universe has grown to 14 billion light years Hubble radius and is 14 billion years old, but that is not the whole story since the volume of the univeerse outside the Hubble radius and permanently unseeable is ten to the thirty times bigger in volume, but earth and sun remain four billion years old.
Since what we see is still changing every day, what we saw before must have been an illusion, so I merely extrapolate that what we see today is still an illusion.
Since what we see is still changing every day, what we saw before must have been an illusion, so I merely extrapolate that what we see today is still an illusion. Ergo, it's all an illusion -- the universe and all its contents, within or outside the Hubble radius? (Not that we could have anything at all to say about the latter.)
Are you saying that when a thing changes, whatever its prior form was, it is now an illusion? But things are changing all the time. Does that mean the universe itself is an illusion? And does that mean that you and I are illusions too?