Adi Shankara clip
Adi Shankara encounters a Chandala (untouchable) and orders him to move. It is actually Lord Shiva in the guise of chandala.
The Chandala makes Shankara realize that the Self ( Truth ) is all pervading but the gross (Body) is transient.
Through this episode, Shankara realizes the main essence of the non-dual Advaita philosophy. Shankara is ashamed and perceives this divine incident and falls at the chandala's feet.