Sūta said:: The word ‘Purā’ indicates what has gone by. If due to its being over in the days of yore the story of the past is decisively fixed by means of Mantras, Brāhmaṇas, Kalpas (Ritualistic texts) and Nigamas (Vedas) of pure expanse it is called Vyavadhāraṇa Kalpanā (conception of ascertainment). “Just as this, so also that”, “This is like that” this is called Upamā (comparison). This is the tenth characteristic feature of the Brāhmaṇa.