Concept:
The 'Rasa' theory is the most influential aesthetic theory in Indian classical performing arts. It refers to the emotional flavor or essence of a work of art that is experienced by the audience.
Step 1: Identifying the Source Text.
The concept of Rasa was first formally articulated in the Natyashastra, an ancient Indian encyclopedic treatise on the performing arts (drama, dance, and music).
Step 2: Understanding the Author and Theory.
Attributed to the sage Bharata Muni, the Natyashastra outlines the *Rasa Sutra*, which explains how the combination of various emotional states (*Bhavas*) leads to the realization of Rasa. There are traditionally eight primary Rasas, such as Shringara (love), Vira (heroism), and Karuna (compassion).