For anyone to remember the Soul (Atma), food is very essential. From Divine Soul (Brahman) Ether emerged. From Ether came Air. From Air was born Fire. And from Fire came Water. From Water, Earth emerged, and from the Earth, various plants and food. Finally from food, human beings evolved. To attain union with the Divine, one has to cross all these stages and take the return journey. The life principle present within our gross body, is called Prana. Within the sheath of Prana (Pranamaya Kosha), is present the sheath of mind (Manomaya Kosha) and within it, the subtler sheath of intellect (Vijnanamaya Kosha). Latent in the Vijnanamaya Kosha is the sheath of bliss (Ananadamaya Kosha). Many people stop journeying after reaching the Mind sheath. To attain bliss you must proceed onward, beyond food, mind and the sheath of the intellect.

- Divine Discourse, 'My Dear Students', Vol 2, Ch 2.