Adrienne Rich quote: “What we see, we see and seeing is changing”

“What we see changes what we know. What we know changes what we see.”

Jean Piaget (1896–1980) Swiss psychologist, biologist, logician, philosopher & academic

“This is perhaps one of the most important things I learned during this investigation: We see what we believe, and not just the contrary; and to change what we see, it is sometimes necessary to change what we believe.”

Jeremy Narby (1959) Canadian anthropologist

Source: The Cosmic Serpent: DNA and the Origins of Knowledge

“We see, we feel, we change.”

John P. Kotter (1947) author of The heart of Change

Conclusion to the 2002 edition, p. 179
The Heart of Change, (2002)

“We must be the change we wish to see in the world.”

Audre Lorde (1934–1992) writer and activist

“We need to be the change we wish to see in the world.”

Mahatma Gandhi (1869–1948) pre-eminent leader of Indian nationalism during British-ruled India

There is "no reliable documentary evidence for the quotation", according to an article in The New York Times. Brian Morton, "Falser Words Were Never Spoken" http://www.nytimes.com/2011/08/30/opinion/falser-words-were-never-spoken.html?_r=0, New York Times, 2011-08-29. It is not found as a direct Gandhi quotation in the 98-volume authorized Collected Works of Mahatma Gandhi. Misquotes that Bapu is forced to wear http://articles.timesofindia.indiatimes.com/2011-10-03/ahmedabad/30238203_1_bapu-tushar-gandhi-gandhiji
The earliest evidence for quotes of this type comes from the "Love Project", an initiative begun at 1970 at a high school in Brooklyn, New York by teacher Arleen Lorrance. According to the project's website http://www.consciousnesswork.com/love.htm, "Be the change you want to see happen, instead of trying to change anyone else" was one the principles of the Project "received" by Lorrance in 1970 -- but contemporaneous evidence for this has not been found.
A 1972 newspaper article states: "Instead of advocating change in people and things, ... Love Project encourages people to actually be change itself". [San Antonio Express, 1972-09-28, 76, 'Love Project' Marks End of Quest, Ron, Fulkerson, https://www.newspapers.com/clip/12194386/love_project_1972/]
In 1974, Lorrance wrote, in a report on the Project: "One way to start a preventative program is to be the change you want to see happen." ( "The Love Project" https://books.google.com/books?id=NcTimfiMzYUC&pg=PA85&lpg=PA85&dq=arleen+lorrance+love+project+1972&source=bl&ots=X5fggiqrCZ&sig=JoOzC2X1QU1eePkOBoy-60rJ1RE&hl=en&sa=X&ved=0ahUKEwiAwIv-_a_MAhUBW2MKHYBQDFIQ6AEIQDAH#v=onepage&q=%22be%20the%20change%22&f=false, in Kellough (ed.), Developing Priorities and a Style, MSS, 1974).
In 1976, a newspaper report listed "'Be the change you want to see happen, instead of trying to change anyone else" as one of the principles of the Love Project. 'A Ministry Called "The Love Project", St Louis Post Dispatch, 1976-11-15, p. 36
In 1987, a similar quote was attributed to Gandhi in a New Mexico newspaper: "You must be the change you wish to see in the world". Hollis Engley, "A Long List of Varied Accomplishments" https://www.newspapers.com/clip/5211946/a_long_list_of_varied_accomplishments/, The New Mexican, Santa Fe, NM, 1987-01-11, p. D-1
In 1991,"We must be the change we wish to see in the world" is attributed to Gandhi in Stella Cornelius, "Partners in Conflict Resolution", from Barnaby (ed.), Building a More Democratic United Nations (1991) Google Book link https://books.google.com/books?id=rcYYoLsFNmAC&pg=PA70&dq=%22be+the+change%22+%22wish+to+see%22&hl=en&sa=X&ved=0CB0Q6AEwAGoVChMI4ufD3tSLyQIVFFJjCh1muQX6#v=onepage&q=%22be%20the%20change%22%20%22wish%20to%20see%22&f=false
Arun Gandhi, grandson of Mahatma Gandhi, has attributed the quote to his famous grandfather since at least 2000 https://web.archive.org/web/20000823060048/http://www.jca.apc.org/g21/panelists.htm. See also "Arun Gandhi Shares the Mahatma's Message" by Michel W. Potts, in India - West [San Leandro, California] Vol. XXVII, No. 13 (1 February 2002) p. A34, and "Be the change you wish to see: An interview with Arun Gandhi" by Carmella B'Hahn, Reclaiming Children and Youth [Bloomington] Vol. 10, No. 1 (Spring 2001) p. 6.< It is not clear whether Arun claims to have directly witnessed his grandfather saying it, or whether he heard of it second-hand.
Misattributed

“We must become the change we want to see.”

Mahatma Gandhi (1869–1948) pre-eminent leader of Indian nationalism during British-ruled India

“Yoga does not just change the way we see things, it transforms the person who sees.”

B.K.S. Iyengar (1918–2014) Indian yoga teacher and scholar

Source: Light on Life: The Yoga Journey to Wholeness, Inner Peace, and Ultimate Freedom, p. 61

“The way we see things is constantly changing. At the moment the way we see things has been left a lot to the camera. That shouldn't necessarily be.”

David Hockney (1937) British artist

From a series of interviews with Marco Livingstone (April 22 - May 7, 1980 and July 6 - 7, 1980) quoted in Livingstone's David Hockney (1981) , p. 112
1980s
Context: When conventions are old, there's quite a good reason, it's not arbitrary. So Picasso discovered that, as it were, and I'm sure that for him that was probably almost as exciting as discovering Cubism, rediscovering conventions of ordinary appearance, one-point perspective or something. The purists think you're going backwards, but I know you'd go forward. Future art that is based on appearances won't look like the art that's gone before. Even revivals of a period are not the same. The Renaissance is not the same as ancient Greece; the Gothic revival is not the same as Gothic. It might look like that at first, but you can tell it's not. The way we see things is constantly changing. At the moment the way we see things has been left a lot to the camera. That shouldn't necessarily be.