I am inclined to think that the universe is an expression of duality, and if we could see beyond that duality we wouldn't just see the unity, but we would be it. The doorknob is just another expression of the duality. Duality is separation, limitation, making the univeral discrete.
I've got a story about that, and rather than point you at where it's posted, I'll post it here --
Several years ago I was playing with my older stepson, when he was about seven. We had a deck of cards, and he spread them across our coffee table and asked me to find the aces.
Having gotten a little bit of a drift of how his mind worked in the two years I had known him, I asked him if he had taken the aces out before he spread out the cards. He had. So he shuffled the aces in and spread the cards back out on the table.
Looking at the cards I had a flash: if I am one with everything, I know where everything is.
I put my hand out over the pile and it was as if I could actually feel when my hand went over an ace. Slowly, I picked up a card and flipped it over.
It was an ace.
I “felt” the cards again, and it seemed like I’d found another one. I picked it up.
A second ace.
The thought went through my mind: I could make money doing this.
I picked up an eight.
*Sigh.*
For a short time I was “in the flow,” I knew things I shouldn’t be able to know. I don’t know if it was the impulse of personal gain that shut it off, or if what really stood behind the impulse was a sense of personal lack, but the door shut and I was a plain old human being again.
From this and other experiences I’ve had, I know that everything and everyone is connected. Some of us have had flashes of it, some of us live in constant awareness of it.
And some of us have never experienced anything like this, which I find very sad.
Now, I can't say I've had anywhere near as many wild cosmic experiences as our dear Erin has, but I will say I've experienced enough to tell me there is Something More.