| "So, there are many volumes of knowledge of this material sky and spiritual sky. In Śrīmad-Bhāgavatam, Second Canto, you will find description of the spiritual sky, what nature it is, what kind of people remain there, what is their feature—everything. Even we get information that in spiritual sky there is aeroplane, spiritual aeroplane in the spiritual sky. And the living entities, they are liberated. They travel on the spiritual sky on that plane, and it is so nice, just like lightning. The description is... They travel just like lightning. So everything is there. This is only imitation. This material sky and everything, whatever you see—all imitation, shadow. It is shadow."