From all the authoritative statements of the great sages, the Vedic hymns and the aphorisms of the Vedanta-sutra, the components of this world are earth, water, fire, air and ether. These are the five great elements (mahabhuta). Then there are false ego, intelligence and the unmanifested stage of the three modes of nature. Then there are five senses for acquiring knowledge: the eyes, ears, nose, tongue and touch. Then five working senses: voice, legs, hands, the anus and the genitals. Then, above the senses, there is the mind, which is within and which can be called the sense within. Therefore, including the mind, there are eleven senses altogether. Then there are the five objects of the senses: smell, taste, warmth, touch and sound. Now the aggregate of these twenty-four elements is called the field of activity. If one makes an analytical study of these twenty-four subjects, then he can very well understand the field of activity. Then there is desire, hatred, pleasure and pain, which are interactions, representations of the five great elements in the gross body. The living symptoms, represented by consciousness and conviction, are the manifestation of the subtle body-mind, ego and intelligence. These subtle elements are included within the field of activities.