Celebrating The World

"I Celebrate myself;
And what I assume you shall assume;
For every atom belonging to me,
as good belongs to you."

When Whitman creates this poem he is exploiting the fact of believing the world as a whole. Us being part of one whole magnum force be it G-d , or some specific part of the universe. We could be part of a whole, why not? This can be considered for the reason of actually wanting to be part of a community. For fright of being left alone, away from the pack.
But what Whitman could possibly mean with this, is that like he celebrates himself, everybody can do that too, to themselves and to him.
His theory of being part of a whole includes an almost Socialist thinking believing that since we are all part of the same matter, meaning that we are all made up from the same energy therefore we must all own each others atoms, brains, and neurons being able to think the same way.
He shares himself, and he shares it with his poems, that are rejected in the moment they are published. His atoms are denied.