in Canto XII from the heights of Macchu Picchu by Pablo Naruda, he is showing sympathy toward the incan people, and placing himself responsible to voice their struggle and opression, and he feels that he must be their voice, where they cannot. i agree with nick that he is also making himself into a martyr. one line that exemplifies this is when Naruda says, "sharpen the knives you kept hidden away, thrust them into my breast, into my hands. this also exemplifies that he has a desire to become the voice of the dead incas, he wishes for them to take the struggles and suffering (knives) that others never knew, and thrust them into him (put their stuggles on him for him to voice to the world.