Love encompasses a variety of strong and positive emotional and mental states, ranging from the most sublime virtue or good habit, the deepest interpersonal affection and to the simplest pleasure. An example of this range of meanings is that the love of a mother differs from the love of a spouse, which differs from the love of food. Most commonly, love refers to a feeling of strong attraction and emotional attachment. Love can also be a virtue representing human kindness, compassion, and affection, as "the unselfish loyal and benevolent concern for the good of another". It may also describe compassionate and affectionate actions towards other humans, one's self or animals. Love in its various forms acts as a major facilitator of interpersonal relationships and, owing to its central psychological importance, is one of the most common themes in the creative arts. Love has been postulated to be a function to keep human beings together against menaces and to facilitate the continuation of the species. Ancient Greek philosophers identified five forms of love: essentially, familial love (in Greek, Storge), friendly love or platonic love(Philia), romantic love (Eros), guest love (Xenia) and divine love (Agape). Modern authors have distinguished further varieties of love: unrequited love, infatuated love, self-love, and courtly love. Asian cultures have also distinguished Ren, Kama, Bhakti, Mettā, Ishq, Chesed, and other variants or symbioses of these states. Love has additional religious or spiritual meaning. This diversity of uses and meanings combined with the complexity of the feelings involved makes love unusually difficult to consistently define, compared to other emotional states.Greek distinguishes several different senses in which the word "love" is used. Ancient Greeks identified four forms of love: kinship or familiarity (in Greek, storge), friendship and/or platonic desire (philia), sexual and/or romantic desire (eros), and self-emptying or divine love (agape). Modern authors have distinguished further varieties of romantic love. However, with Greek (as with many other languages), it has been historically difficult to separate the meanings of these words totally.Two philosophical underpinnings of love exist in the Chinese tradition, one from Confucianism which emphasized actions and duty while the other came from Mohism which championed a universal love.In Mandarin Chinese, 愛 (ài) is often used as the equivalent of the Western concept of love. 愛 (ài) is used as both a verb (e.g. 我愛你, Wǒ ài nǐ, or "I love you") and a noun (such as 愛情 àiqíng, or "romantic love"). Instead of frequently saying "I love you" as in some Western societies, the Chinese are more likely to express feelings of affection in a more casual way. Consequently, "I like you" (我喜欢你, Wǒ xǐhuan nǐ) is a more common way of expressing affection in Chinese; it is more playful and less serious.[36] This is also true in Japanese (suki da, 好きだ).Kama in Indian literature means "desire, wish or longing". In contemporary literature, kama refers usually to sexual desire. However, the term also refers to any sensory enjoyment, emotional attraction and aesthetic pleasure such as from arts, dance, music, painting, sculpture and nature.Rumi, Hafiz and Sa'di are icons of the passion and love that the Persian culture and language present. The Persian word for love is Ishq, which is derived from Arabic language, however it is considered by most to be too stalwart a term for interpersonal love and is more commonly substituted for "doost dashtan" ("liking"). In the Persian culture, everything is encompassed by love and all is for love, starting from loving friends and family, husbands and wives, and eventually reaching the divine love that is the ultimate goal in life.