Not hard is not muscle strength or endurance, until at last, because it might be dangerous but not light until barely to lose because they are not useful.
Is not hard to do with muscle power. Or patience to the end Because of the potential danger But not to the light Until hardly force him. You will not benefit
Not hard is not trying to muscle, or tolerance to the end. It could be dangerous, but not to the light, until almost do not need to exert much. Because they are not useful.