Do you believe in oxygen?

Get some fuel and some fire, you'll see how adding oxygen will fan the flames

My god! You're right! It isn't real! And because I've never seen an fish in the actual ocean they must not be real either! And I've never seen Paris, so fake news there too! And you...definitely never seen you, so you';re fake as well!

gravity is at least as invisible, you are welcome to jump off a bridge to test whether it's real, if you must.

Question of the day .
Hats Off.

But then I don't pray to it. I don't expect it to talk to me either.

Don't hold your breath waiting for the answer.

An oxygen molecule isn't invisible, just really small. You can see an individual molecule with advanced microscopes.

because you can freeze it

We just know.

😱

As covered it's not invisible, but also things do not need to be visible for us to accept them as real. Gravity for example, cannot be seen. But we can interact with it. We can make repeatable tests to confirm or falsify what we know about gravity.