Narayan Krishnan, the man featured in the video below, was chosen by CNN in 2010 for the CNN Heroes Award. Krishnan is a Brahmin, the highest of the castes in the Indian caste system. Although technically outlawed, the caste system in India is still widely practiced, and the men and women Krishnan serves belong to the lowest caste, considered to be the “Untouchables.” Krishnan gives his answer to the timeless human question, “What is the purpose of life?”