Kindness is a type of behavior marked by acts of generosity, consideration, or concern for others, without expecting praise or reward in return. It is a subject of interest in philosophy, religion, and psychology.
It can be directed towards one's self or other people, and is present across multiple different species and cultures.
History In English, the word kindness dates from approximately 1300, though the word's sense evolved to its current meanings in the late 14th century. The word "kindness" comes from the Old English "kyndnes", which is related to "kind", meaning "nature" or "family", or "love". This suggests that kindness was initially seen as a natural quality within one's kin.
In ancient philosophy There are discussions of kindness in both Western and Eastern philosophical traditions.
In “Rhetoric II Chapter 7”, Aristotle defines kindness (charis) as “helpfulness towards someone in need”. He focuses his discussion on the needs of the person helped. Kindness is great if it is shown toward “someone in great need, or in need of what is important or what is difficult to get, or someone who has need in a crisis, or if the helper is the only one or first one”. Also, the service should be non-transactional and rendered freely without the consideration of personal gain (“not in return for anything, nor for the advantage of the helper himself”).Aristotle. (1954). Rhetoric (W. R. Roberts, Trans.). Modern Library. (Original work published 4th century B.C.E.) He emphasises the importance of action when showing kindness (“service”), but does not comment on feelings of pain or pleasure of the person acting in kindness. In other words, a person may think that it is right and proper to stand by others who are in need, but this does not have to be accompanied by any emotions. Furthermore, Aristotle seems to hold the view that when acting out of kindness, sympathy goes out to an individual because of the circumstances the individual happens to be in, and not because of who the specific individual happens to be. Kindness is offered for the sake of the beneficiary, whether or not one has an attachment to him. This kind of anonymity in one’s response distinguishes it from friendship - when a person acts out of a specific concern for a particular person.
Ren, a central concept of Confucius’ moral philosophy, is interpreted by scholars as shared humanity or kindness for others. The term suggests a deep interconnectedness among people and embodies the belief that each person is part of a wider human community that should be treated with shared kindness. To Confucius, ren was the foundation from which all human virtue grew. It also starts with kindness towards one's family, as goodwill shown at home will transform into compassion in the community and the world. In “Analects”, Confucius discusses the tension between two key virtues - kindness and righteousness (yi). When asked whether hatred should be repaid with kindness, he replied "And what will you repay kindness with? Rather repay hatred with justice, and kindness with kindness."Confucius. (1997). The Analects (S. Leys, Trans.). W. W. Norton & Company. While one should not deliberately seek vengeance out of momentary anger, nor should one conceal resentment over a grudge and repay it with kindness. This suggests that mature morality requires knowing when to apply which virtue. The "Records of Ritual" distinguishes between the domains of these two virtues, suggesting that in regulating one’s household, kindness overrules righteousness, while outside of one’s house, righteousness cuts off kindness.
In modern philosophy While some definitions of kindness focus on emotional warmth or good-natured impulses, Immanuel Kant disagreed with the idea that feeling kind was enough to make an action moral. Across his works, he distinguishes between pathological love (as inclination) and practical love (from duty). In “Groundwork of the Metaphysics of Morals”, Kant suggests that an act possesses moral worth only when it is practiced as a conscious, rational commitment rather than a fleeting feeling. For Kant, being kind-hearted is different from having a will governed by moral principle. True moral kindness stems from a good will and occurs when you help someone because it is the right thing to do, even when you don't feel like doing it. In addition, Kant emphasizes that we must treat others always as ends in themselves and never merely as a means to an end. In the context of kindness, this implies that one should not be kind merely to achieve one’s own goals, but rather as a rational recognition of the inherent dignity and value of the other person.
Friedrich Nietzsche offers a critique of this perspective that kindness is a rational obligation that honors the dignity of all humans. For Nietzsche, kindness is not a neutral or universal good and should therefore be practiced cautiously. He identifies kindness and sympathy as central virtues of a slave-morality that originates among the oppressed and those uncertain of themselves.Nietzsche, F. (2004). Slave and master morality (L. Archie & J. G. Archie, Eds.). In Reading for philosophical inquiry (Release 0.21). Oklahoma State University Libraries. https://open.library.okstate.edu/introphilosophy/chapter/slave-and-master-morality-by-nietzsche/ (Original work published 1886) He argued that a morality centered on alleviating all suffering (the idea of mitleid - pity or compassion or sympathy) is a denial of life. He advocated instead for people to strive towards a master-morality that values excellence and the endeavour to become great and strong by overcoming obstacles and challenges.Santos, E. (2021, April 20). On compassion: A Nietzschean perspective. Medium. https://medium.com/@edmundos99/on-compassion-a-nietzschean-perspective-8420871415ca Nietzsche suggests that when kindness is taken to the extreme, it robs our finitude of significance because it fails to recognize the ennobling aspects of suffering. By trying to eliminate pain, kindness may inadvertently stifle the striving and greatness that suffering can produce.
In religion Being kind and doing good to others is a tenet of Islam, and the Quran recommends to practice kindness as a way to attain serenity and tranquillity of the soul. “Surah 2 Al-Baqara, Ayah 263” states that “Kind words and forgiveness are better than charity followed by injury”. Treating others with kindness is more important than giving money and then reminding others of the favour with hurtful or mocking words, as the latter actions can nullify the reward of the charity. Kindness towards parents, spouses, neighbours and orphans are repeatedly mentioned in the Quran, but notably, Islam encourages Muslims to show kindness even towards enemies and oppressors. Prophet Muhammad displayed kindness to his enemies, hoping to heal rifts through compassion and understanding. When his enemies came to the Ka’bah during the conquest of Mecca, he said to his former adversaries, “I say to you as Yusuf said to his brothers: No blame upon you today. Allah will forgive you, for he is the most merciful of the merciful.” In addition to kindness towards people, Islam also teaches one to be kind to animals, as they are also creations of Allah and deserving of care. “Surah Al-An’am, ayah 38” states that “All the creatures that crawl on the earth and those that fly with their wings are communities like yourselves.”
In Hinduism, the practice of kindness is a spiritual necessity rooted in the theological understanding of monism (seeing all life as one). This sense of universal interconnectedness drives the foundational principle of ahimsa (non-violence), which mandates harmlessness in thought, word, and deed toward all sentient beings, and can be expressed through various ways such as vegetarianism, environmental protection, or caring for the vulnerable. Practicing kindness is also intrinsically tied to the idea of good karma, where selfless acts of dana (giving) and sewa (selfless service) serve to purify the soul and accumulate positive merit. By performing these services, an individual fulfills their righteous obligations while undergoing an internal transformation toward spiritual enlightenment.BBC. (n.d.). Hindu social action and concern. BBC Bitesize. Retrieved April 1, 2026, from https://www.bbc.co.uk/bitesize/guides/zmgx382/revision/5Rajayogini. (2023, October 22). Compassion in Hinduism: A path to spiritual enlightenment. https://www.rajayogini.com/post/compassion-in-hinduism-a-path-to-spiritual-enlightenment
In psychology From the perspective of developmental and positive psychology, kindness has been considered a state of being that reflects inner emotions and attitudes, and is manifested in behaviors and dispositions in the way one relates to others and oneself. It is a multidimensional construct that developmentally evolves, shaped by cognitive development, personal and interpersonal factors and social contexts. As individuals mature across childhood and adolescence, their understanding and expression of kindness become more complex, reflecting growing social and relational awareness and competency.
A kindness model has been proposed that distinguishes between three core components of kindness: 1) kind emotions, 2) kind cognitions, and 3) kind behaviors. Each of these components can be other-oriented or self-oriented. Kind emotions refer to emotions of sympathy, empathy, and respect (other-oriented), or feelings of ethical guilt over wrongdoing or pride after acting in line with one’s ideals and ethical principles (self-oriented). Kind cognitions reflect an active process of understanding and integrating others’ perspectives into one’s own. Self-reflection is also essential to appreciate the relativity of every standpoint and synthesize various perspectives, which ultimately broadens the mind’s range and openness for new experiences. Both kind emotions and cognitions require mindfulness – the ability to observe and be aware of one’s own emotional states and thoughts as they relate to interactions with others. Kind actions that are other-oriented include simple acts of helping or comforting another person, or more complex prosocial behaviours such as sharing with or being inclusive of discriminated people. Self-oriented kind actions include self-caring behaviours. The more each of these components are learnt and practiced as part of everyday life, the more power they will have to transform the self.