[8]: 8 Jorunn J. Buckley identifies Yushamin as "both a Lightworld utra beyond reproach and the prototype of a priest who has made mistakes in ritual.
[11] Yushamin and his sons set in motion the events leading to creating the material world (tibil), due to deciding to participate in creation without consulting the First Life; this is accounted in book 3 of the Right Ginza.
[1]: 29–30 The first ten chapters of the Mandaean Book of John give further accounts related to the progress of the rebellion of Yushamin and his sons against the King of Light (malka ḏ-nhura, i.e. Hayyi Rabbi), and their eventual reconciliation against the wishes of Manda d-Hayyi.
Yushamin is mentioned in the first chapter as having set the eternal great conflict in motion, and in more detail in the second as having revealed the secret of the Great, and been cast down due to starting a fight with the Light, or the Mighty's house, lacking concern and humility, in contrast to Yukabar (ࡉࡅࡊࡀࡁࡀࡓ) having brought calm.
[9] However, the origin of the demiurgic (Ptahil) is attributed to Abatur, the Third Life,[9] and the fallen Sophia pending redemption parallels Ruha.