translation.en: So when people's symptoms go away, they tend to recur, because there isn't a sense of the other half -- of what pleasure, happiness, compassion, gratitude, what are the positive emotions.
translation.zh: 因而 当人们的症状消失了 又复返了 这是因为另一半缺失了 那就是愉悦 幸福 同情心 感激之情 这些积极的情绪