“The greatest real thrill that life offers is to create, to construct, to develop something useful. Too often we fail to recognize and pay tribute to the creative spirit. It is that spirit that creates our jobs. There has to be this pioneer, the individual who has the courage, the ambition to overcome the obstacles that always develop when one tries to do something worthwhile, especially when it is new and different.”

As quoted in The Magic of Teamwork (1997) by Pat Williams
Year unknown, published in 1990s

Source: The Faith of Leap (2011), p. 96

Mister Rogers' Neighborhood: Thoughts For All Ages http://pbskids.org/rogers/all_ages/thoughts1.htm

2013, Brandenburg Gate Speech (June 2013)
Context: The wall belongs to history. But we have history to make as well. And the heroes that came before us now call to us to live up to those highest ideals -- to care for the young people who can't find a job in our own countries, and the girls who aren't allowed to go to school overseas; to be vigilant in safeguarding our own freedoms, but also to extend a hand to those who are reaching for freedom abroad. This is the lesson of the ages. This is the spirit of Berlin. And the greatest tribute that we can pay to those who came before us is by carrying on their work to pursue peace and justice not only in our countries but for all mankind.

East of Eden (1952)
Context: Our species is the only creative species, and it has only one creative instrument, the individual mind and spirit of a man. Nothing was ever created by two men. There are no good collaborations, whether in art, in music, in poetry, in mathematics, in philosophy. Once the miracle of creation has taken place, the group can build and extend it, but the group never invents anything. The preciousness lies in the lonely mind of a man.
And now the forces marshaled around the concept of the group have declared a war of extermination on that preciousness, the mind of man. By disparagement, by starvation, by repressions, forced direction, and the stunning blows of conditioning, the free, roving mind is being pursued, roped, blunted, drugged. It is a sad suicidal course our species seems to have taken.
And this I believe: that the free, exploring mind of the individual human is the most valuable thing in the world. And this I would fight for: the freedom of the mind to take any direction it wishes, undirected. And this I must fight against: any religion, or government which limits or destroys the individual. This is what I am and what I am about. I can understand why a system built on a pattern must try to destroy the free mind, for it is the one thing which can by inspection destroy such a system. Surely I can understand this, and I hate it and I will fight against it to preserve the one thing that separates us from the uncreative beasts. If the glory can be killed, we are lost.

Letter to President Franklin Delano Roosevelt while director of the Office of Scientific Research and Development. (5 July 1945)
Context: The pioneer spirit is still vigorous within this nation. Science offers a largely unexplored hinterland for the pioneer who has the tools for his task. The rewards of such exploration both for the Nation and the individual are great. Scientific progress is one essential key to our security as a nation, to our better health, to more jobs, to higher standard of living, and to our cultural progress.

Source: The Hero of Ages

Source: Healing Our World: In An Age of Aggression, (2003), p. 17

The Basic Teachings - Part 1: Principles of the Teaching (2009)