Nelson Mandela is awarded the Nobel Peace Prize in Norway, 1993

The Nobel Peace Prize for 1993 was awarded to Nelson Mandela and Ladik William Declercq for their efforts in peacefully ending apartheid and establishing a democratic South Africa. Mandela acknowledges the prize as a greater personal obligation to work for justice and democracy for all South Africans.

What personal obligation did the speaker express regarding the Nobel Peace Prize?

In what context does the speaker mention striving harder for justice and democracy?