Āstika ( Sanskrit : आस्तिक āstika ; `` it exists '' ) and Nāstika ( नास्तिक , nāstika ; `` it does n't exist '' ) are technical terms in Hinduism used to classify philosophical schools and persons , according to whether they accept the authority of the Vedas as supreme revealed scriptures , or not , respectively .
Astika ( Sanskrit : आस्तिक : `` orthodox '' ) and Nastika : ( `` heterodox '' ) are technical terms in Hinduism used to classify philosophical schools and persons , according to whether they accept the authority of the Vedas as supreme revealed scriptures , or not .