Exactly the way I have thought recently, and it scares me because it sounds I'm going crazy.
Sometimes I think the opposite, something in the back of my mind telling me I'm the universe, the person beside me, a rock, we're all one same thing, which is similar to pantheism.
For you that think that way and want to think more about it, I recommend Alan Watts videos on yt.
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Empty yourself of everything.
Let the mind rest at peace.
The ten thousand things rise and fall while the Self watches their return.
They grow and flourish and then return to the source.
Returning to the source is stillness, which is the way of nature