the word "pusan" appears in a vedic era "upanishad", meaning "nourisher" and associates it with the creation of earth and production activities that nourishes the whole world, and the text calls this "pusan" as shudra. the term "pusan", in hindu mythology, is the charioteer of the sun who knows the paths thereby bringing light, knowledge and life to all. the same word "pusan" is, however, associated in a brahmana text to vaishya.