Acharya Prashant explains the concept of delusion through the metaphor of a moth drawn to a flame, as referenced by Kabir Saheb. He describes how a moth is biologically deceived into thinking the light of a fire is a mating call from a female moth. This attraction leads the moth to its death because it seeks fulfillment in a place where it cannot be found. This, the speaker asserts, is the essence of illusion or Maya: perceiving something that does not exist and seeking love or satisfaction in places where it is impossible to obtain.