quote:  from jfk library

"Some men see things as they are and say, 'Why'? I dream of things that never were and say, 'Why not'?"

Robert Kennedy made this quotation famous during his 1968 Presidential campaign.  Although he apparently used it on several occasions as a kind of slogan, the only occasion for which we have been able to find documentation is his speech at the University of Kansas on March 18, 1968.  In its original form, the quotation was said by the serpent in George Bernard Shaw's play Back to Methuselah , and was used by President Kennedy in his Speech to the Irish Parliament on June 28, 1963:  "Speaking as an Irishman [Shaw] summed up an approach to life: 'Other people,' he said, 'see things and say: why - but I dream things that never were and say: why not.'"

does anyone not know when and who spoke this?:

Ask Not what your country can do for you.

Ask what you can do for your country.