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13./  The Supreme Being  
Upon the attainment of the finaliter levels of ascendant experience, these spirits of the sixth stage appear to transmute some mind factor representing a union of certain phases of the mortal and Adjuster minds which had previously functioned as liaison between the divine and human phases of such ascending personalities. This experiential mind quality probably "supremacizes" and subsequently augments the experiential endowment of evolutionary Deity -- the Supreme Being.    107:5.6
https://mm.spiritualfamily.net/Urantia_Book-Online_Reader-2019/Paper_107.html#107:5.6