[Constitution Day]

Excellent!
Here's one for you:

"The slaves of power mind the cause they have to serve, because their own interest is concerned; but the friends of liberty always sacrifice their cause, which is only the cause of humanity, to their own spleen, vanity, and self-opinion."

- William Hazlitt (1778 - 1830)

[SkyRat]

Very good.

"Sometimes it is said that man cannot be trusted with the government of himself. Can he, then, be trusted with the government of others? Or have we found angels in the forms of kings to govern him? Let history answer this question."
--Thomas Jefferson - First Inaugural Address.

Heavier-than-air flying machines are impossible.
- Lord Kelvin, ca. 1895, British mathematician and physicist

Radio has no future
- Lord Kelvin, ca. 1897.