:::: There are lots of teaching sites on the net  that make this point. And it's sort of obvious, is it not? If the only force that acts on you is gravity, you cannot tell that situation from being weightless, out in far space where there is not gravity. Thus, you can't feel gravity-alone. It feels like no gravity. You have to look out the window to see your acceleration relative to far away things, to infer it. But you don't feel it (absent "microgravity" tidal and gradient effects, which are very small unless you're near neutron stars or star-mass black holes).