John F. Kennedy — "Let us consider how we can strengthen the fabric of our society."

"Those who make peaceful revolution impossible will make violent revolution inevitable."

"Too often we... enjoy the comfort of opinion without the discomfort of thought."

"Mankind must put an end to war or war will put an end to mankind."

"The cost of freedom is always high, but Americans have always paid it. And one path we shall never choose, and that is the path of surrender, or submission."

"I think this is the most extraordinary collection of talent, of human knowledge, that has ever been gathered together at the White House, with the possible exception of when Thomas Jefferson dined alo…"