Jefferson's last letter: Thomas Jefferson was invited to attend a celebration in Washington DC on July 4, 1826, to commemorate the 50th anniversary of the signing of the Declaration of Independence. He had to decline due to reasons of health, but he did write the following in his last letter:

I should, indeed, with peculiar delight, have met and exchanged there congratulations personally with the small band, the remnant of that host of worthies, who joined with us on that day, in the bold and doubtful election we were to make for our country, between submission or the sword; and to have enjoyed with them the consolatory fact, that our fellow citizens, after half a century of experience and prosperity, continue to approve the choice we made.

May it be to the world, what I believe it will be, (to some parts sooner, to others later, but finally to all,) the signal of arousing men to burst the chains under which monkish ignorance and superstition had persuaded them to bind themselves, and to assume the blessings and security of self-government.

That form which we have substituted, restores the free right to the unbounded exercise of reason and freedom of opinion. All eyes are opened, or opening, to the rights of man. The general spread of the light of science has already laid open to every view the palpable truth, that the mass of mankind has not been born with saddles on their backs, nor a favored few booted and spurred, ready to ride them legitimately, by the grace of God. These are grounds of hope for others. For ourselves, let the annual return of this day forever refresh our recollections of these rights, and an undiminished devotion to them.

(Via Marginal Revolution, from last year.)