“Do you decide to observe? Or do you merely observe?”
5th Public Talk Saanen (26th July 1970); also in "Fear and Pleasure", The Collected Works, Vol. X
1970s
Context: Do you decide to observe? Or do you merely observe? Do you decide and say, "I am going to observe and learn"? For then there is the question: "Who is deciding?" Is it will that says, "I must"? And when it fails, it chastises itself further and says, "I must, must, must"; in that there is conflict; therefore the state of mind that has decided to observe is not observation at all. You are walking down the road, somebody passes you by, you observe and you may say to yourself, "How ugly he is; how he smells; I wish he would not do this or that". You are aware of your responses to that passer-by, you are aware that you are judging, condemning or justifying; you are observing. You do not say, "I must not judge, I must not justify". In being aware of your responses, there is no decision at all. You see somebody who insulted you yesterday. Immediately all your hackles are up, you become nervous or anxious, you begin to dislike; be aware of your dislike, be aware of all that, do not "decide" to be aware. Observe, and in that observation there is neither the "observer" nor the "observed" — there is only observation taking place. The "observer" exists only when you accumulate in the observation; when you say, "He is my friend because he has flattered me", or, "He is not my friend, because he has said something ugly about me, or something true which I do not like." That is accumulation through observation and that accumulation is the observer. When you observe without accumulation, then there is no judgement.
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Jiddu Krishnamurti 233
Indian spiritual philosopher 1895–1986Related quotes


“You see, but you do not observe.”
What Every Body is Saying: An FBI Agent's Guide to Speed-Reading People
Original: This quote comes from the book "A Scandal in Bohemia" from Arthur Conan Doyle

Objecting to the placing of observables at the heart of the new quantum mechanics, during Heisenberg's 1926 lecture at Berlin; related by Heisenberg, quoted in Unification of Fundamental Forces (1990) by Abdus Salam ISBN 0521371406
1920s

“Do you seriously entertain the idea that without the observer there is no reality?”
"On the Philosophical Problems in Quantizing Macroscopic Objects"(ca. 1962-1963) as quoted by Morinigo, Wagner, & Hatfield, Feynman Lectures on Gravitation (2002)
Context: This is all very confusing, especially when we consider that even though we may consistently consider ourselves to be the outside observer when we look at the rest of the world, the rest of the world is at the same time observing us, and that often we agree on what we see in each other. Does this then mean that my observations become real only when I observe an observer observing something as it happens? This is a horrible viewpoint. Do you seriously entertain the idea that without the observer there is no reality? Which observer? Any observer? Is a fly an observer? Is a star an observer? Was there no reality in the universe before 109 B. C. when life began? Or are you the observer? Then there is no reality to the world after you are dead? I know a number of otherwise respectable physicists who have bought life insurance.

Quoted in "In Tito's Death Marches and Extermination Camps" - Page 163 - by Joseph Hecimovic, John Prcela - 1962.

“Here you doubtless observe my tendency to do wrong against my will.”
As quoted when he talked about his piano concerto, op.11.
Context: Here you doubtless observe my tendency to do wrong against my will. As something has involuntarily crept into my head through my eyes, I love to indulge it, even though it may be all wrong.

[The Many Worlds Theory, 24 October 2018, YouTube, https://www.youtube.com/watch?v=iXRLDatmbgA] (12:16 of 56:11)

“You can do what you decide to do — but you cannot decide what you will decide to do.”
Free Will
Variant: You can do what you decide to do—but you cannot decide what you will decide to do.

“This observation is merely the extension of a law”
Introductory
A Treatise on Man and the Development of His Faculties (1842)
Context: This observation is merely the extension of a law well known to all who have studied the condition of society in a philosophic manner: it is, that so long as the same causes exist, we must expect a repetition of the same effects. What has induced some to believe that moral phenomena did not obey this law, has been the too great influence ascribed all times to man himself over his actions.