Grahita, Grahana and Grahya are terms in Samkhya and Yoga. Here is a look at the meaning of these words. Sage Patanjali has mentioned these words in Yoga Sutra in connection with the definition of deep mental absorption called samapatti (I: 41). These three are the main categories into which the 25 tattvas forming the universe according to Samkhya and Yoga can be grouped. Grahita is the soul, called drashta in Yoga. It is the seer, perceiver of the universe. Grahana means a sense organ. There are in all 13 sense organs, out of which ten are bahya (external) and three abhyantara (internal), also called antah-karana. Karana, which is same as grahana, is the means or instrument of knowledge. The internal organs are buddhi (intellect), asmita or ahankara (the ego feeling), and manas (the mind). The ten external organs are divided into two groups namely, gyanendriya (sense organs) and karmendriya (motor organs). Grahya means that which is known or received in knowledge, i.e. the o