"There are two verses in the Canaka Sloka how a family or an institution can be glorified or burned into ashes by one person. The Canaka Pandit says that if there is one tree in the forest producing nice aromatic flower, that one tree can glorify the whole forest by the flavor of its flower. Similarly if there is one tree in whose cavity there is a little fire, that one tree can burn into ashes the whole forest. So this simile is applicable anywhere. In a family if there is one good boy, he can glorify the whole family and similarly if there is bad boy he can turn the whole family into ashes. Similarly in this institution if there is a bad disciple he can burn the whole institution into ashes."
(Srila Prabhupada Letter, Bombay, August 25, 1970)