Which excerpt from the scarlet ibis most foreshadows that the narrator will feel regret for something he had done to doodle

There is within me (and with sadness I have watched it in others) a knot of cruelty borne by the stream of love, much as our blood sometimes bears the seed of our destruction, and at times I was mean to Doodle.

Explanation:

This was probably one of the saddest lines in the entire story. He is older when he says this thinking back on the memories of him and his brother.

okay so where are the word that i need to use?