Who said it works in a vacuum?
Science. Experiments. Jars devoid of gas yet somehow stuff doesn't float in it.
Who said space is a vacuum? Who said anything about space? I'm talking about the thoroughly experimented on property of matter known as density, and its observable effects on earth.
You said space, not me. Also, I'm talking about observable effects on earth too. A lead brick isn't going to float in a jar full of nothing anymore than it'll float in a jar full of air. Also, if the density of air and us kept us down, then the total force keeping you down is equal to the force acting downwards on you: ie. the weight of the air above you. This is very very false and can be demonstrated with some very simple math.
I directed you towards Hermeticism and you are the one that wants to talk about the Bible and Christianity only. No one said any religion is there to tell you how our natural world works, it deals with the supernatural.
The shape of the Earth is not supernatural. Thus, if you want to use religion to convince people of the shape of the earth, then you have a contradiction.
I'm not anti-science, in fact I completely agree with the original intention of the scientific method, that is observation of our physical universe and experimentation to test different elements of it. When things become abstract mathematics with relatively (pun intended) little resemblance to reality is where I believe science has took a turn for the worse.
So you're ok with observational science which proves the Earth is round then complain about abstract concepts you don't understand, and all in a thread saying we should have Flat Earth taught as a religion....
I'm done.
You are either trolling or one giant contradiction. Either way, convincing you that you're wrong is pointless. So go ahead, preach that the Earth is flat due to non-scientific reasons while then saying that science is good.