Founding Documents - Similarities

The Declaration of Independence and the Constitution are similar in expressing the need for a government to be ran in the interest of the people (democracy). For example, the Declaration of Independence states that the government should only "deriv[e] their just powers from the consent of the governed". Because of this, they establish a base to argue against a corrupt government. This is illustrated as The Declaration goes on to say that when this government becomes "destructive" it is "the Right of the People to alter or to abolish it, and to institute new Government, laying its foundation on such principles and organizing its powers in such form, as to them shall seem most likely to effect their Safety and Happiness". 
These same principles are clearly seen within the United States' Constitution. Articles 1, 2, and 3 establish our system of democracy. Here, the limitations of the legislative, executive, and judicial branches are laid out. If those holding these positions abuse their power they "shall be removed from Office on Impeachment for, and Conviction of, Treason, Bribery, or other high Crimes and Misdemeanors". This ensures that a corrupt government may never be allowed to occur.
It is my belief that both these documents were truly created with the intent of defending and laying out the best possible system of government. Both documents are thorough in their discussions and often repetitive in nature. However, I believe that this repetition exists because it emphasizes the importance of the doctrine.