You should work extra hard to be your best selves. True evil has a hard time operating in the face of strenuous manifestations of good. Especially if you act right away. The longer you let evil hang around and get a grip on you, the harder it is to get rid of it.
Twice Upon a Marigold (ed. Houghton Mifflin Harcourt, 2009) - ISBN: 9780547546070