“You See Things; And You Say, ‘Why?’ But I Dream Things That Never Were; And I Say, “Why Not?".

"Our answer is the world's hope; it is to rely on youth. The cruelties and the obstacles of this swiftly changing planet will not yield to obsolete dogmas and outworn slogans. It cannot be moved by those who cling to a present which is already dying, who prefer the illusion of security to the excitement and danger which comes with even the most peaceful progress. This world demands the qualities of youth: not a time of life but a state of mind, a temper of the will, a quality of the imagination, a predominance of courage over timidity, of the appetite for adventure over the love of ease".
Robert F. Kennedy, "Day of Affirmation", speech, University of Capetown, South Africa June 6, 1966

Robert F. Kennedy's "I Dream" quote actually paraphrases the above quote by George Bernard Shaw.

Video by John Hay of Brisbane, Queensland, Australia and based on the book "The Power of One"