“One of the most wonderful and engaging things I've learned is that we are the culmination and extension of each other's histories and there is more that binds us together than separates us, and in discovering this, perhaps our needs are timeless and universal.
I have a very deep interest in religion and spirituality. I like the Sufi perspective, which suggests that it is better to participate in the world than to become detached from the world.”

55 min 20 sec
Cosmos: A Personal Voyage (1990 Update), Who Speaks for Earth? [Episode 13]
Context: Since this series' maiden voyage, the impossible has come to pass: Mighty walls that maintained insuperable ideological differences have come tumbling down; deadly enemies have embraced and begun to work together. The imperative to cherish the Earth and protect the global environment that sustains all of us has become widely accepted, and we've begun, finally, the process of reducing the obscene number of weapons of mass destruction. Perhaps we have, after all, decided to choose life. But we still have light years to go to ensure that choice. Even after the summits and the ceremonies and the treaties, there are still some 50,000 nuclear weapons in the world — and it would require the detonation of only a tiny fraction of them to produce a nuclear winter, the predicted global climatic catastrophe that would result from the smoke and the dust lifted into the atmosphere by burning cities and petroleum facilities.
The world scientific community has begun to sound the alarm about the grave dangers posed by depleting the protective ozone shield and by greenhouse warming, and again we're taking some mitigating steps, but again those steps are too small and too slow. The discovery that such a thing as nuclear winter was really possible evolved out of the studies of Martian dust storms. The surface of Mars, fried by ultraviolet light, is also a reminder of why it's important to keep our ozone layer intact. The runaway greenhouse effect on Venus is a valuable reminder that we must take the increasing greenhouse effect on Earth seriously.
Important lessons about our environment have come from spacecraft missions to the planets. By exploring other worlds we safeguard this one. By itself, I think this fact more than justifies the money our species has spent in sending ships to other worlds. It is our fate to live during one of the most perilous and, at the same time, one of the most hopeful chapters in human history.
Our science and our technology have posed us a profound question. Will we learn to use these tools with wisdom and foresight before it's too late? Will we see our species safely through this difficult passage so that our children and grandchildren will continue the great journey of discovery still deeper into the mysteries of the Cosmos? That same rocket and nuclear and computer technology that sends our ships past the farthest known planet can also be used to destroy our global civilization. Exactly the same technology can be used for good and for evil. It is as if there were a God who said to us, “I set before you two ways: You can use your technology to destroy yourselves or to carry you to the planets and the stars. It's up to you.”

Vogue Voices: Tom Ford, Vogue, January 10, 2014, April 18, 2016 https://www.youtube.com/watch?v=QpTvfYC71d8,

Speech to the Labour Party Conference in Scarborough (6 October 1960) in favour of revising Clause IV, quoted in The Times (7 October 1960), p. 20
1960s

Vol. I, The Way of Illumination, Section I - The Way of Illumination, Part III : The Sufi.
The Spiritual Message of Hazrat Inayat Khan
Context: The religion of the Sufi is not separate from the religions of the world. People have fought in vain about the names and lives of their saviors, and have named their religions after the name of their savior, instead of uniting with each other in the truth that is taught. This truth can be traced in all religions, whether one community calls another pagan or infidel or heathen. Such persons claim that theirs is the only scripture, and their place of worship the only abode of God. Sufism is a name applied to a certain philosophy by those who do not accept the philosophy; hence it cannot really be described as a religion; it contains a religion but is not itself a religion. Sufism is a religion if one wishes to learn religion from it. But it is beyond religion, for it is the light, the sustenance of every soul, raising the mortal being to immortality.

Essay for This I Believe (1952)
Other speeches and writings

Source: A Monk in the World: Cultivating a Spiritual Life (2003), p. 1

[John Archibald Wheeler, Kenneth William Ford, Geons, Black Holes, and Quantum Foam: A Life in Physics‎, W. W. Norton & Company, 2000, 0393319911, 153]

Source: Free Trade Reimaginedː The World Division of Labor and the Method of Economics (2007), p. 210