In Zen, the fixed self is sometimes referred to as the Ghost Cave.
We can see our practice as a kind of dynamic coming and going. From this place out into the illuminated universal and back again into the apparent personal, and so on, endlessly. The metaphor of cave, an opening in the mountain, is worth paying attention to.
The self is not characterized as a prison, something we are trapped within. Or something to be annihilated. Rather, it is to be understood. It is a Ghost Cave because we do not understand it. The ghosts are restless because they do not understand themselves.
This cave is part of the Great Mountain of all things. It is our only way inside this mountain. Dynamic, compassionate awareness pacifies the mind. Pacifies the whole mountain.