1. Switching off & on a fan

    “Your sinful karma is like a revolving fan,” Swamiji explains. “By chanting Hare Krishna, you turn it off. The fan may still revolve for a while after
    being turned off, but since it is getting no more juice, it will soon stop.” “When it stops, does it stop for good?” someone asks. “You know where the switch is,” Swamiji says. “You can always turn it back on.”

    (From: The Hare Krishna Explosion by Hayagriva Dasa)