The saddest sentence makes me want to cry

The saddest sentence in a novel might be a sentence describing a character who had experienced a lot of pain and struggle but could only watch the world leave him. For example: He watched the sun set, watched the sky gradually darken, and finally waited silently for the arrival of death. He felt as if he had been abandoned by the world, living alone in a world without light. Or describe a character who once had a lot of good things but lost them for some reason, making people feel endless regret and sadness. For example: He once had a wonderful job and a wonderful partner, but these wonderful things gradually disappeared in his life and eventually became his eternal regret. These sentences might make people feel very sad because they describe the pain and struggle in the character's heart, as well as the helplessness and sadness of losing the good.