The past has no power to stop you from being present now. Only your grievance about the past can do that. What is grievance? The baggage of old thought and emotion.
The wise person dines on something more subtle: He eats the understanding that the named was born from the unnamed, that all being flows from non-being, that the describable world emanates from an indescribable source.
Governing a large country is like frying a small fish. You spoil it with too much poking. Center your country in the Tao and evil will have no power. Not that it isn't there, but you'll be able to step out of its way. Give evil nothing to oppose and it will disappear by itself.