In the dead of the night, the cry for help came to his ears and his heart couldn't be at ease. Therefore, he lifted his quilt and put on his outer garment and walked out.
The old man shook his head after he walked out of the room and had no choice but to get up as well. Although the old man was not a nosey person, but that cry for help made him feel a mess in his heart.
If you didn't have the ability to save someone, that's why you didn't help, that made sense. However, he obviously had the ability and if he pretended that he was sleeping the whole time, even if no one had said anything, he wouldn't have been able to live with the guilt.
"Hey, this old man has a kind heart." He said to himself and walked out of the room with his hands behind his back.
