Baha'u'llah's father had the title of vizier for one of the sons of
Fath-Ali Shah Qajar. His father was stripped of his title by
the Grand Vizier, who, according to sources, still showed favor to Baha'u'llah after this heinous act. It was the Grand Vizier that offered Baha'u'llah the position that he eventually turned down. >> By evidence, I guess you mean a written document from the Grand Vizier to Baha'u'llah? I am unaware of any. <<
.. it is a question of a life of luxury versus a life without luxury. A fat ego loves luxury and seeks a path of ease rather than hardship. .. It would be better for @Aupmayav to question Baha'u'llah's sanity instead.