Reason for the unimaginable nature of God The unimaginable God has no spatial dimensions
Everything in this world which has spatial dimensions is imaginable. The spatial dimensions may be very minute but can be recorded through sophisticated instruments and thus the minute entity becomes imaginable. Only an entity not having any spatial dimension becomes unimaginable. Therefore, the reason for the unimaginable nature is only the absence of spatial dimensions. Such an entity must be beyond space.
The third phase is the process of creation of this Universe from such unimaginable entity. There is a logical necessity for the generator of the Universe, which essentially includes space, not to have the spatial dimensions. The logic in the generation processes of worldly items is that the cause exists even in the absence of the effect. The lump of mud exists even if the pot is absent.
The mud is the cause and pot is the effect. The imaginable entity having no spatial dimensions must be the cause of this Universe having spatial dimensions. The reason for this is that in the absence of the Universe, which means the absence of the space, the unimaginable entity having no spatial dimensions can exist. The absence of spatial dimension means the absence of space or Universe only. Therefore, the unimaginable God having no spatial dimensions must be the cause and the Universe or space having spatial dimensions must be the effect.