They shall say: 'The Truth,' and He is the Most High, the Most Great". Verily, this refers to the first day of the White Return and the Radiant Recurrence.'
'As the Master Ja’far al-Sadiq—may His might be exalted—said: "When it [the earth/sun] trembles and turns white, and its Light covers the entire earth, the Meaning shall manifest within it through the Visual Form of the Unveiled and the Vast."'
He says: Regarding the Almighty’s saying: {'O mankind, fear your Lord. Indeed, the convulsion of the Hour is a terrible thing. On the Day you see it, every nursing mother will be distracted from that [child] she was nursing}' 1 . He said: 'On the Day they see it'—meaning the Visual Form, which is the Promised Hour and the very Essence of the Creator. It is she who shall cause the creation to be struck with awe... etc.
He says: 'Whoever denies the Visual Form is a nullifier (mubtil); whoever likens [anything else] to it is a polytheist (mushrik); and whoever affirms Existence through it is a Unitarian (muwahhid).'
He says, quoting from the 'Mufaddaliyya Treatise' (al-Risala al-Mufaddaliyya): 'He established the Form of Existence through Light (Nur), Radiance (Diya’), and Shadow (Zill).