Srimad Bhagavatam 10.05.03-04 - Getting Rid of Contamination through Purification (download mp3) and (download flv)
by Bhakti Vijnana Goswami Maharaj at ISKCON Chowpatty
dhenunam niyute pradad
tiladrin sapta ratnaugha-
Nanda Maharaja gave two million cows, completely decorated with cloth and jewels, in charity to the brahmanas. He also gave them seven hills of grain, covered with jewels and with cloth decorated with golden embroidery.
sudhyanti danaih santustya
O King, by the passing of time, land and other material possessions are purified; by bathing, the body is purified; and by being cleansed, unclean things are purified. By purificatory ceremonies, birth is purified; by austerity, the senses are purified; and by worship and charity offered to the brahmanas, material possessions are purified. By satisfaction, the mind is purified; and by self-realization, or Krsna consciousness, the soul is purified.
These are sastric injunctions concerning how one can purify everything according to Vedic civilization. Unless purified, anything we use will infect us with contamination. In India five thousand years ago, even in the villages such as that of Nanda Maharaja, people knew know to purify things, and thus they enjoyed even material life without contamination.