Why did Sakura think she could kill Sasuke alone? Was it out of love or a sense of duty?
True strength is defined not by the power to destroy, but by the capacity to endure pain for the sake of others. Discussion Points for Study 214 : The Burden I Should Bear
The "burden" refers to the personal responsibility characters feel for Sasuke's defection—Sakura's guilt, Kakashi's failure as a teacher, and eventually Naruto’s resolve to bear the weight of Sasuke’s hatred. A Guide to the Core Themes 1. The Responsibility of a Teacher Why did Sakura think she could kill Sasuke alone
Sasuke asks Sakura to replace Karin as his medic, reducing her value to a tool. How does this contrast with how Team 7 originally valued her? Discussion Points for Study The "burden" refers to
Sakura finds Sasuke, who has just defeated Danzo and is consumed by hatred. She claims she wants to join him, but Sasuke tests her resolve by demanding she kill the injured Karin.
Sasuke's burden is the "curse of hatred" from the Uchiha clan, while Naruto’s burden (introduced shortly after) is the choice to absorb that hatred to stop the cycle of violence.
Kakashi exemplifies the burden of leadership. He views Sasuke’s descent into darkness as his personal failure.