In Civil Disobedience, How does Thoreau suggest people can contribute to improving the government?Please include quotes!

It's strange, but I think that Thoreau is probably more of
the logic that suggests individuals have more of a moral clarity than government does. 
Thoreau holds little hope for the institution of government.  Similar to a Classical
Liberal, Thoreau hopes for the government to "get out of the way" of an individual's
call to action and demand to adhere to a morally transcendent law.  Thoreau argues that
individuals can improve their government as an institution and governing body by
adhering to this law and speaking out when there is transgression against it.  For
Thoreau, when citizens are able to heed this call without hesitation, accepting whatever
temporal consequences might come as a result, this level of spiritual liberation and
action will allow individuals to achieve a higher moral plane and their government and
social settings, both temporary conditions, will follow suit.