The ninth and last substance in the list of Vaiśeṣika philosophy is termed as mind (manas) and has been described as an internal organ. 1 Ordinarily, mind in Indian tradition has been enunciated as a means for meditation, 2 and the significance of the Vaiśeṣika view lies in the fact that here it is accepted not only as an instrument for experiencing internal emotions such as pleasure and pain but also as an essential instrument for cognition of external objects by other sense-organs. 3