During his time on Earth, Bhagavan Krishna had several roles: son, sibling, partner, friend and ruler. His goal was to help eliminate ignorance and sinfulness of mankind.
He was also a teacher to his disciple, Arjuna, whom he taught the supreme principles of yoga and Vedanta. His teachings can be found in the ancient Hindu scripture, the Bhagavad Gita, which may be translated as "Song of God." In this text, Krishna explains yoga as an art of being both active and inward, an art of both complete nonattachment and profound interest.