Has anyone ever really seen you or heard you? If it is assumed you are the body, a limited human form, then this will seem an absurd question - of course people have seen you and heard you speak. But if it is recognised that you are not the human body, and the real you has a spiritual nature, then it shouldn't seem such an odd question. Even then, when it is known that I am not the body, the mind still associates with the body. So it's useful to shake the tree, as they say.
Nobody has ever seen you. You have no form. You are that in which the form appears and disappears. Nobody has ever heard you. You don't have a voice. You don't make a sound. You are the stillness in which sounds appear and disappear. You don't have arms and legs, a head and a brain. That's the human body. It is the body that is seen and heard, felt and known. You are not the apparently limited form.
We think of the human body as being made of matter. But matter isn't really what it appears to be. The solidity of the human body is only relative. Our usual understanding of 'solidity' is something stable, unchanging and impervious - nothing can get through it. But there is no substance that is truly stable, unchanging and impervious. Solid matter is not truly solid. It's only relatively solid compared to other levels of solidity. For example, ice is only relatively more solid and stable than water. Ice is not truly stable, but it appears more stable than its more fluid form.
The human body is only relatively stable. We know this. It is continually changing. It's not perceptible that the body changes within an hour, but the nails are slowly growing, hair is slowly growing, skin is slowly being replaced, air is entering the body system. The body is not a closed system that remains stable. So even if we did identify as the human body, we couldn't really say where its limits are. Although the body seems to be autonomous within the planet, it is really made of the planet substance and is continually flowing and changing with the planet.
It's quite a shift for the mind to turn from identifying as a human. Recognising the spiritual nature of oneself brings in another consideration. Is not the substance that the body is made of, namely matter, just a form of condensed spirit, as ice is a form of condensed water? And if it is thought that I am a soul, isn't the soul also unlimited in a similar way to how the body is unlimited? The soul would be one with its environment also, and not really a solid, limited unchanging form. And if there are no limits, then there cannot truly be many souls.
Some may argue against this in defence of the soul, and that's fine. It is a way of understanding how the spiritual world works: souls take on human form and experience life as a human on planet Earth. That's fine and a useful understanding. But if we closely examine it, it will be found that there are no limits to anything. Humans only appear separate by the air or space between them, yet they continually interact with the air and space. So humans aren't really separate from anything. They are more like interactive, flowing, evolving, forms that only appear dense, limited or solid relative to the environment in which they appear and of which they are made. It is similar with souls also.
The message here is that we are not human and we are not souls. There are no real limits between the human forms or soul forms. Our true nature is unlimited. The universe's true nature is unlimited. There is only What Is, the Infinite One appearing as though it is many. What seems to separate the many is nothing other than the Infinite One that is the substance of all.