From And the Mountains Echoed: A Novel by Khaled Hosseini:

…But I could not. And later, I did not want to. I did careless things. Reckless things.”

She sits back in the chair, her shoulders slumping, puts her thin white hands in her lap. She considers for a minute before saying, “J’aurais dû être plus gentille—I should have been more kind. That is something a person will never regret. You will never say to yourself when you are old, Ah, I wish I was not good to that person. You will never think that.”

For a moment, her face looks stricken. She is like a helpless schoolgirl. “It would not have been so difficult,” she says tiredly. “I should have been more kind. I should have been more like you.