The accumulation of all powers, legislative, executive, and judiciary, in the same hands, whether of one, a few, or many, and whether hereditary, sel… - James Madison

Notwithstanding the security for future repose which the United States ought to find in their love of peace and their constant respect for the rights of other nations, the character of the times particularly inculcates the lesson that, whether to prevent or repel danger, we ought not to be unprepared for it. This consideration will sufficiently recommend to Congress a liberal provision for the immediate extension and gradual completion of the works of defense, both fixed and floating, on our maritime frontier, and an adequate provision for guarding our inland frontier against dangers to which certain portions of it may continue to be exposed.

[7th Annual Message to Congress, Dec. 5, 1815]

It may be a reflection on human nature, that such devices should be necessary to control the abuses of government. But what is government itself, but the greatest of all reflections on human nature? If men were angels, no government would be necessary. If angels were to govern men, neither external nor internal controls on government would be necessary. In framing a government which is to be administered by men over men, the great difficulty lies in this: you must first enable the government to control the governed; and in the next place oblige it to control itself.

No nation could preserve its freedom in the midst of continual warfare.