名詞
出自《孟子》，指仁、義、禮同智嘅源頭，即係惻隱、羞惡、辭讓、同埋是非之心 Mencius' Four Principles, which include the principles of benevolence, righteousness, propriety, and knowledge, which are the feelings of commiseration, of shame and dislike, of modesty, and of approving and disapproving.