Lost in Translation?

The seal of the U.S. state of Virginia depicts the figure of Virtue standing over the fallen figure of Tyranny, with her foot on Tyranny’s throat and a quote underneath thus leading to one of the oldest jokes saying that it really means “Get your foot off my neck.” The quote is however attributed to Brutus, who supposedly said it after assassinating Caesar.

John Wilkes Booth also said it after assassinating Abraham Lincoln.

However Virginia did send a letter to Washington condemning his use of their motto.

Also, the guy involved in the Oklahoma bombing was arrested wearing a t-shirt with this quote.

What quote?