Well firstly I might point out that without limit/boundary does not imply one can walk through walls, as there are conditions that would ordinarily prevent this with basic physicality. This much is self evident. However I would not assume the "hard-reality" many might perceive and thus take to be true reality. That said, to clear what may be seen as the obvious and perhaps that already understood, to attempt to explain the limitlessness using an analogy may go like this: That understood, conceived of and received via another - a thought, notion, belief or other is simply placed upon the work-table so to speak. The work table in this analogy is the conscious understanding of all existence. Thus anything - any idea, concept or similar may be placed upon the table, rather than any rejection through perceptual bias for example. So the first point might be that everything may be considered, with the consideration for that which has yet to be considered also. The second point might be that nothing on the table is simply assumed to be an absolute truth.

The freedom aspect we will perhaps consider at a later point. There is still more to fit into the picture with regards to a relation between freedom and chaos.

On the limitlessness, you have mentioned/used the word "open" previously - I would say there is at least a parallel there in the understanding. Even if consciously unaware of what is being said here, perhaps like yourself one can still be "open" to a degree.

I will leave it there for now and let you contemplate if you choose.