The heart of all sacred places and shrines is the Preceptor. The heart of all pure and cleansing things is Fire. All acts done by a good and pious person are good and praiseworthy, including even the touching of the hair of a cow's tail.
तीर्थानां हृदयं तीर्थं शुचानां हृदयं शुचिः। सर्वमार्यकृतं चौक्ष्यं वालसंस्पर्शनानि च।॥