Based on this paragraph, what does Briony mean when she says at the conclusion: ""I like to think that it isn't weakness or evasion, but a final act of kindness, a stand against oblivion and despair, to let my lovers live and to unite them at the end."

Based on this passage, Briony is explaining, as the narrator of the novel, why she fabricated the portion of the story involving the reunion of Robbie and Cecilia.