Gacet:  We have been friends forever . Did I ever once betray you ?
Rodrigo Borgia: How would we know ?
Gacet: Would you be the Pope if I had ?
Rodrigo Borgia: Do not act as if we own our life to you . And do not act as if you do * not * owe your life to us !
Gacet: I do . And you do . Our lives are entwined , the two of us . Either I am zero and you are _ zero _ , or together we are the universe !
Rodrigo Borgia: No , I am the heart , and you are the head . If emotion can now sway you , then we do not work . You claim that what I saw mattered not , but how can I be certain ? How can I know which past decisions , guided by you , must be re - examined ? Would you yourself not advise me that this is the end ?
Gacet: I will be gone tomorrow . Some problems are unsolvable , some questions unanswerable . No matter what we do , we will never be free of mortality , partiality , or error .