“Whether our ancestors came here on the Mayflower, on slave ships, whether they came to Ellis Island or LAX in Los Angeles, whether they came yesterday or walked this land a thousand years ago our great challenge for the 21st century is to find a way to be One America. We can meet all the other challenges if we can go forward as One America.”

1920s, Toleration and Liberalism (1925)
Context: We must not, in times of peace, permit ourselves to lose any part from this structure of patriotic unity. I make no plea for leniency toward those who are criminal or vicious, are open enemies of society and are not prepared to accept the true standards of our citizenship. By tolerance I do not mean indifference to evil. I mean respect for different kinds of good. Whether one traces his Americanisms back three centuries to the Mayflower, or three years to the steerage, is not half so important as whether his Americanism of today is real and genuine. No matter by what various crafts we came here, we are all now in the same boat. You men constituted the crew of our 'Ship of State' during her passage through the roughest waters. You made up the watch and held the danger posts when the storm was fiercest. You brought her safely and triumphantly into port. Out of that experience you have learned the lessons of discipline, tolerance, respect for authority, and regard for the basic manhood of your neighbor. You bore aloft a standard of patriotic conduct and civic integrity, to which all could repair. Such a standard, with a like common appeal, must be upheld just as firmly and unitedly now in time of peace. Among citizens honestly devoted to the maintenance of that standard, there need be small concern about differences of individual opinion in other regards. Granting first the essentials of loyalty to our country and to our fundamental institutions, we may not only overlook, but we may encourage differences of opinion as to other things. For differences of this kind will certainly be elements of strength rather than of weakness. They will give variety to our tastes and interests. They will broaden our vision, strengthen our understanding, encourage the true humanities, and enrich our whole mode and conception of life. I recognize the full and complete necessity of 100 per cent Americanism, but 100 per cent Americanism may be made up of many various elements.

1960s, Special message to Congress on the right to vote (1965)
Context: In our system, the first right and most vital of all our fights is the right to vote. Jefferson described the elective franchise as "the ark of our safety." It is from the exercise of this right that the guarantee of all our other rights flows. Unless the right to vote be secure and undenied, all other rights are insecure and subject to denial for all our citizens. The challenge to this right is a challenge to America itself. We must meet this challenge as decisively as we would meet a challenge mounted against our land from enemies abroad.

An Interview with Dr. Leo Igwe — Founder, Nigerian Humanist Movement (2017)

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Toronto Star (March 15, 1992)

Source: The Sacred Depths of Nature (1998), p. 169

The statement "The future of all life, including our own, depends on our mindful steps." and much of the theme of this essay also occur later in his writings, including The World We Have : A Buddhist Approach to Peace and Ecology (2008), Ch. 1 : The Bells of Mindfulness, p. 3
The Sun My Heart (1996)
Context: All life is impermanent. We are all children of the Earth, and, at some time, she will take us back to herself again. We are continually arising from Mother Earth, being nurtured by her, and then returning to her. Like us, plants are born, live for a period of time, and then return to the Earth. When they decompose, they fertilize our gardens. Living vegetables and decomposing vegetables are part of the same reality. Without one, the other cannot be. After six months, compost becomes fresh vegetables again. Plants and the Earth rely on each other. Whether the Earth is fresh, beautiful, and green, or arid and parched depends on the plants.
It also depends on us. Our way of walking on the Earth has a great influence on animals and plants. We have killed so many animals and plants and destroyed their environments. Many are now extinct. In turn, our environment is now harming us. We are like sleepwalkers, not knowing what we are doing or where we are heading. Whether we can wake up or not depends on whether we can walk mindfully on our Mother Earth. The future of all life, including our own, depends on our mindful steps.

"Remarks in Newport at the Australian Ambassador's Dinner for the America's Cup Crews (383)" (14 September 1962) http://www.jfklibrary.org/Research/Research-Aids/Ready-Reference/JFK-Quotations.aspx<!-- Public Papers of the President: John F. Kennedy, 1962 -->
1962
Context: I really don't know why it is that all of us are so committed to the sea, except I think it's because in addition to the fact that the sea changes, and the light changes, and ships change, it's because we all came from the sea. And it is an interesting biological fact that all of us have, in our veins the exact same percentage of salt in our blood that exists in the ocean, and, therefore, we have salt in our blood, in our sweat, in our tears. We are tied to the ocean. And when we go back to the sea — whether it is to sail or to watch it — we are going back from whence we came.

3001: The Final Odyssey (1997)
1990s
Context: Finally, I would like to assure my many Buddhist, Christian, Hindu, Jewish, and Muslim friends that I am sincerely happy that the religion which Chance has given you has contributed to your peace of mind (and often, as Western medical science now reluctantly admits, to your physical well-being). Perhaps it is better to be un-sane and happy, than sane and un-happy. But it is the best of all to be sane and happy. Whether our descendants can achieve that goal will be the greatest challenge of the future. Indeed, it may well decide whether we have any future.

2000s, 2005, Second Inaugural Address (January 2005)