Descripción en Youtube:
Nicolai Ghiaurov sings the famous bass aria from Verdi's Simon Boccanegra.
La Scala, 1978. Conductor: Claudio Abbado.
For a free English translation, please see the following:
http://operainenglish.blogspot.it/2012/11/il-lacerato-spirito-simon-boccanegra.html