“…and i am learning to hope
like a bird
learns
its first
affair
with wind
and sun
like an orange
learns
to take flight
into the mouth
of a boy
in summer…”

Speech to the Western Society of Engineers (18 September 1901); published in the Journal of the Western Society of Engineers (December 1901); republished with revisions by the author for the Annual Report of the Board of Regents of the Smithsonian Institution (1902) http://invention.psychology.msstate.edu/i/Wrights/library/Aeronautical.html
Context: The person who merely watches the flight of a bird gathers the impression that the bird has nothing to think of but the flapping of its wings. As a matter of fact this is a very small part of its mental labor. To even mention all the things the bird must constantly keep in mind in order to fly securely through the air would take a considerable part of the evening. If I take this piece of paper, and after placing it parallel with the ground, quickly let it fall, it will not settle steadily down as a staid, sensible piece of paper ought to do, but it insists on contravening every recognized rule of decorum, turning over and darting hither and thither in the most erratic manner, much after the style of an untrained horse. Yet this is the style of steed that men must learn to manage before flying can become an everyday sport. The bird has learned this art of equilibrium, and learned it so thoroughly that its skill is not apparent to our sight. We only learn to appreciate it when we try to imitate it.

Source: …And All the Stars a Stage (1971; [serialized in 1960]), Chapter 13 (p. 180)

Source: The Wheel of Time: Shamans of Ancient Mexico, Their Thoughts About Life, Death and the Universe], (1998), Quotations from "The Power of Silence" (Chapter 18)

1960s, The Quest for Peace and Justice (1964)
Context: There is a sort of poverty of the spirit which stands in glaring contrast to our scientific and technological abundance. The richer we have become materially, the poorer we have become morally and spiritually. We have learned to fly the air like birds and swim the sea like fish, but we have not learned the simple art of living together as brothers.

Interview with Oded Fehr http://www.somethingjewish.co.uk/articles/69_interview_with_oded_.htm (2001)

In debate http://hansard.millbanksystems.com/commons/1952/nov/04/debate-on-the-address in the House of Commons, 4 Nov 1952
Post-war years (1945–1955)
Variant: Personally, I'm always ready to learn, although I do not always like being taught.
Context: Personally, I am always ready to learn, although I do not always like being taught, but I shall not attempt to foreshadow the proposals which will be brought before the House tomorrow. Today it will be sufficient and appropriate to deal with the obvious difficulties and confusion of the situation as we found it on taking office.

Source: 1890s, The Principles of Psychology (1890), Ch. 9

"Lingering Still".
Volume Two (2010)

Interview, Town Hall (1973)