“The time to repair the roof is when the sun is shining.[State of the Union Address January 11 1962]”

“Too often we hold fast to the clichés of our forebears. We subject all facts to a prefabricated set of interpretations. We enjoy the comfort of opinion without the discomfort of thought.[Commencement Address at Yale University, June 11 1962]”

“The great enemy of truth is very often not the lie--deliberate, contrived and dishonest--but the myth--persistent, persuasive and unrealistic. Too often we hold fast to the cliches of our forebears. We subject all facts to a prefabricated set of interpretations. We enjoy the comfort of opinion without the discomfort of thought.[Commencement Address at Yale University, June 11 1962]”

“We choose to go to the moon in this decade and do the other things, not because they are easy, but because they are hard.[Address at Rice University, September 12 1962]”

“If a free society cannot help the many who are poor, it cannot save the few who are rich.[Inaugural Address, January 20 1961]”

“Those who make peaceful revolution impossible will make violent revolution inevitable."[Remarks on the first anniversary of the Alliance for Progress, 13 March 1962]”

“Mankind must put an end to war - or war will put an end to mankind.[Address before the United Nations, September 25 1961]”