久溺深海心易冷
[jiŭ nì shēn hăi xīn yì lĕng]
After Drowning Too Long in Deep Sea, One's Heart Becomes Easy Cold suggests that prolonged loneliness leads to emotional cooling or detachment. After too much hurt and pain over time in relationships, some individuals withdraw and become emotionally cold towards everything and everyone around them. The 'deep sea' metaphor is often used in China for depression and other mental illnesses.