John Kennedy actually said...

"I run for the office of the Presidency in the most difficult time in the life of our country, in many ways the most difficult in a hundred years."

"We say we can do better because we believe that this country has unlimited resources, because we believe it has unlimited energy, and because we believe it has an unlimited potential."

"I can assure you that if we are successful in January of 1961, that we are going to move ahead in this country"

"I don't run for the office of the Presidency promising you that if I am elected that life will be easy and the problems all solved"