karmani-material fruitive activities; arabhate-begins; dehi-a living entity who has accepted a particular type of body; dehena-with that body; atma-anuvartina-which is received according to his desire and past activities; karmabhih-by such material activities; tanute-he expands; deham-another body; ubhayam-both of them; tu-indeed; avivekatah-due to ignorance.