Hiiro realizes that he possesses Dagan Zot's heart, and that if he dies, Dagan Zot will die as well.  Only after Giruu reveals the depths of his devotion does Hiiro find the strength to carry on.
What if your hearts were switched?
ماذا لو تبادل قلبيكما الأماكن؟
¿Y si cambiaron sus corazones?
¿Qué tal si cambiaron sus corazones?
Ça peut signifier
que vos cœurs ont été échangés !
E se i vostri cuori fossero stati invertiti?
E se seus corações foram trocados?