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The form of government which you admire, when its principles are pure is admirable indeed. It is productive of every Thing which is great and excellent among men. But its principles are as easily destroyed as human nature is corrupted. Such a government is only to be supported by pure religion or Austere morals.

Massachusetts Historical Society, John Adams, Samuel Adams, James Warren (1917). “Warren-Adams Letters: Being Chiefly a Correspondence Among John Adams, Samuel Adams, and James Warren ... 1743-1814”
The form of government which you admire, when its principles are pure is admirable indeed. It is productive of every Thing which is great and excellent among men. But its principles are as easily destroyed as human