A rasa (Sanskrit: रस lit. 'juice' or 'essence') denotes an essential mental state and is the dominant emotional theme of a work of art or the primary feeling that is evoked in the person that views, reads or hears such a work.

Although the concept of rasa is fundamental to many forms of Indian art including dance, music, musical theatre, cinema and literature, the treatment, interpretation, usage and actual performance of a particular rasa differs greatly between different styles and schools of abhinaya, and the huge regional differences even within one style.

Bharata Muni enunciated the eight Rasas in the Nātyasāstra, an ancient work of dramatic theory. Each rasa, according to Nātyasāstra, has a presiding deity and a specific colour. There are 4 pairs of rasas. For instance, Hasya arises out of Sringara. The Aura of a frightened person is black, and the aura of an angry person is red. Bharata Muni established the following.

Abhinavagupta suggested a ninth rasa when only eight were accepted and it had to undergo a good deal of struggle between the sixth and the tenth centuries, before it could be accepted by the majority of the Alankarikas, and the expression Navarasa (the nine rasas), could come into vogue.

Rasa may refer to:

Aesthetics (also spelled æsthetics or esthetics) is a branch of philosophy dealing with the nature of beauty, art, and taste, with the creation and appreciation of beauty. It is more scientifically defined as the study of sensory or sensori-emotional values, sometimes called judgments of sentiment and taste. More broadly, scholars in the field define aesthetics as "critical reflection on art, culture and nature."

The word aesthetic is derived from the Greek αἰσθητικός (aisthetikos, meaning "esthetic, sensitive, sentient"), which in turn was derived from αἰσθάνομαι (aisthanomai, meaning "I perceive, feel, sense"). The term "aesthetics" was appropriated and coined with new meaning in the German form Æsthetik (modern spelling Ästhetik) by Alexander Baumgarten in 1735.

Examples of pre-historic art are rare. The context of their production and use is unclear. Aesthetic doctrines that guided their production and interpretation are mostly unknown.

Ancient art was largely, but not entirely, based on the eight great ancient civilizations: Egypt, Mesopotamia, Persia, Greece, China, Rome, India, the Celtic peoples, and Maya. Each of these centers of early civilization developed a unique and characteristic style in its art. Greece had the most influence on the development of aesthetics in the West. This period of Greek art saw a veneration of the human physical form and the development of corresponding skills to show musculature, poise, beauty and anatomically correct proportions. Furthermore, in many Western and Eastern cultures alike, traits such as body hair are rarely depicted in art that addresses physical beauty.^{[citation needed]} In contrast with this Greek-Western aesthetic taste is the genre of the grotesque.