Complex sentence: The schizophrenic creates their own internal, mental reality in which they define and control everything, making them true heroes, a mind and purpose that is superior to anything in directly observable, external reality (including other people).
Split into simpler sentences: The schizophrenic creates their own internal, mental reality in which they define and control everything. This makes them pure heroes, living in a mental reality that is superior to and independent of anything in directly observable, external reality (including other people).