Westerners seem to believe that "no one knows what Jesus thought", which means that the way Jesus redeemed the world may not be understood by the world. Heather obviously plays the role of redemption in the film, but the method is more alternative.
For Nicole, when she was most helpless, she needed someone to warm and comfort her, and Heather played this role. For grandma, who always wanted someone to accompany, even if it was just a conversation and a walk, Heather played that role. To TJ, Heather smashed TJ's originally stagnant life to pieces, shattered TJ's fantasy that Heather would protect him, and shattered Nicole, the only pure land in TJ's heart. He shattered almost all of TJ's spiritual hiding places, all self-deception and weakness, so that he could face and face everything, and help him in times of crisis. And at the end of the film, he pointed out the way out of life for TJ and his father.
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