Ren (Chinese: 仁, meaning "co-humanity" or "humaneness") is the highest Confucian virtue meaning the good quality of a virtuous human when reaching for higher ideals or when being altruistic. According to Confucius, Ren does not have a singular definition; it encompasses benevolence, trustworthiness, courage, compassion, empathy, and reciprocity. It is expressed through interpersonal relationships and can be cultivated through the observance of proper ritual (li). Ren is also a central principle in Confucian political theory: a ruler with the Mandate of Heaven is one of great virtue, who leads by moral example and prioritizes the well-being of the people.