Tang Zhong had been following his master for nearly 60 years and he had witnessed what the man had been through all that time. He had accompanied his master to experience all these things, but Master had never shown his sad and weak side all these years. He had almost forgotten Master was also a man of emotions and desires. Suddenly hearing Master's true words, he could not help but feel sad.
Yes, although Master didn't look sad, he was actually sad in his heart. When Miss Tang Ya disappeared and then they heard that she died, Master's hair had almost turned white overnight. Later on, Master's wife died and he rarely saw a smile on his face after that, but the man had still managed to bring up Young Master alone.