Reality and illusion 

let there be no confusion 

have to be separate clearly first 
and to be mixed intimately next

it's a culinary art
contents in separate parts

added in right ratio and proportion 
to prepare cookies of taste and nutrition

   Rishi sees

sees dream while dreaming

sees sleep while sleeping 

sees wake while waking 

and never he is in illusion 

since he is a thuriaatheeth , ie 4th state coexisting in 3 states

He knows even wake is mithya, the ever changing reality ephemeral 

which is different from never changing reality that is brahma 

he knows lives brahma sathyam 

while staying in jagath mithya