The source of life for all living beings is food and all living beings are food and all the world seeks food. 

Complexion, clarity, good voice, long life, understanding, happiness, satisfaction, growth, strength and intelligence are all established in food. 

Whatever is beneficial for worldly happiness(Laukik), 

whatever pertains to the Vedic leading to heaven and

whatever actions lead to Apvarga spiritual salvation are said to be established through food only.