The following is nerdy:
About the title word... "Super" often means "transcending", supersonic means to transcend the speed of sound... So "superunknown" could mean, what lies beyond the unknown or "above" the unknown. We are all striving to transcend or go beyond/further, but do we even know, just what it is, we're trying to transcend?
So maybe the message is, that we have to figure out, where we are, where we stand and so on..., before we can go further, and this perpetual (futile) striving is actually holding us back... Because it isn't grounded in reality.
What steals your mind and then your soul could be ambition.
The verses speak of making peace with your mind. Don't overthink things...
The following is nerdy: About the title word... "Super" often means "transcending", supersonic means to transcend the speed of sound... So "superunknown" could mean, what lies beyond the unknown or "above" the unknown. We are all striving to transcend or go beyond/further, but do we even know, just what it is, we're trying to transcend? So maybe the message is, that we have to figure out, where we are, where we stand and so on..., before we can go further, and this perpetual (futile) striving is actually holding us back... Because it isn't grounded in reality. What steals your mind and then your soul could be ambition. The verses speak of making peace with your mind. Don't overthink things...