The Answer is simple. That which you are is not known. The identity which you call the self is the knowledge of self. It is known. Being is called the knower that is unknown. It could be considered as awareness. Then there is the Identityless one. which is truly One.
The awareness is beyond it's own being. The soul and spirit are beings. The True Self is The Being with the identity of the One. The true self knows it's Truth.
@Power