Therefore, as soon as there is pollution, means there is a class of men who have polluted. They are called duṣkṛta, sinful. When there is increase of the number of sinful persons, there must be pollution in the system of religious life. This is the way. If everyone is following religious principle, everyone does not commit any sinful activity, so at that time, there is no chance of pollution in religiousness.
At the present moment, they do not know what is pollution and they do not know what is religious principle. That is the defect of the modern civilization, that religion is described in the dictionary, "a kind of faith," not principle. But according to Vedic conception, religion is not a kind of faith. Religion is... It is your must duty. That is religion. Or it is your natural occupation. You cannot change it. Faith you can change. "I am now Muhammadan; I become Hindu."