'Jiāng xīn bǐ xīn' literally means 'take one’s heart and compare it with another’s heart.' It expresses the ethical idea of empathy—consciously imagining oneself in another person’s situation to understand their feelings, motives, or difficulties. The phrase emphasizes emotional reciprocity: just as you hope others would consider your perspective, you should extend that same consideration to them.

This idiom is deeply rooted in Confucian values of benevolence (rén) and mutual respect. It commonly appears in advice about conflict resolution, parenting, teaching, and workplace communication. Though grammatically flexible—as both a noun ('this principle of empathy') and a verb ('to empathize')—it’s most frequently used predicatively or as a standalone exhortation. It carries a warm, humane, and slightly formal tone, often heard in moral instruction or reflective speech rather than casual chat.