From JFK speach at Ft Worth C of C on the morning of Nov 22, 1963:
"So this country, which desires only to be free, which desires to be secure, which desired to live at peace for 18 years under three different administrations, has borne more than its share of the burden, has stood watch for more than its number of years. I don't think we are fatigued or tired. We would like to live as we once lived. But history will not permit it. The Communist balance of power is still strong. The balance of power is still on the side of freedom. We are still the keystone in the arch of freedom, and I think we will continue to do as we have done in our past, our duty, and the people of Texas will be in the lead."
Thomas Jefferson also said an informed public is the keystone.