"Eckhart, Brethren of the Free Spirit," from Communalism: From Its Origins to the Twentieth Century (1974), ch. 4
Context: The influence of Meister Eckhart is stronger today than it has been in hundreds of years. Eckhart met the problems of contingency and omnipotence, creator-and-creature-from-nothing by making God the only reality and the presence or imprint of God upon nothing, the source of reality in the creature. Reality in other words was a hierarchically structured participation of the creature in the creator. From the point of view of the creature this process could be reversed. If creatureliness is real, God becomes the Divine Nothing. God is not, as in scholasticism, the final subject of all predicates. He is being as unpredicable. The existence of the creature, in so far as it exists, is the existence of God, and the creature’s experience of God is therefore in the final analysis equally unpredicable. Neither can even be described; both can only be indicated. We can only point at reality, our own or God’s. The soul comes to the realization of God by knowledge, not as in the older Christian mysticism by love. Love is the garment of knowledge. The soul first trains itself by systematic unknowing until at last it confronts the only reality, the only knowledge, God manifest in itself. The soul can say nothing about this experience in the sense of defining it. It can only reveal it to others.
“As Buddhist teachers often point out, knowledge, in the sense of prajña, is not knowledge about anything. There is no abstract knower of an experience that is separate from the experience itself.”
Source: The Embodied Mind (1991), p. 26, partly cited in: In 7 Quotes or Less http://evenhigherlearning.wordpress.com/2009/05/08/in-7-quotes-or-less-the-embodied-mind-by-francisco-j-varela-evan-thompson-and-eleanor-rosch/ at evenhigherlearning.wordpress.com, June 8, 2009
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Francisco Varela 17
Chilean biologist 1946–2001Related quotes

Introduction I. Of the Difference Between Pure and Empirical Knowledge
Critique of Pure Reason (1781; 1787)
Variant: That all our knowledge begins with experience there can be no doubt.
Context: That all our knowledge begins with experience there can be no doubt. For how is it possible that the faculty of cognition should be awakened into exercise otherwise than by means of objects which affect our senses, and partly of them selves produce representations, partly rouse our powers of understanding into activity, to compare, to connect, or to separate these, and so to convert the raw material of our sensuous impressions into a knowledge of objects, which is called experience? In respect of time, therefore, no knowledge of ours is antecedent to experience, but begins with it. But though all our knowledge begins with experience, it by no means follows, that all arises out of experience. For, on the contrary, it is quite possible that our empirical knowledge is a compound of that which we receive through impressions, and that which the faculty of cognition supplies from itself (sensuous impressions giving merely the occasion)... It is, therefore, a question which requires close investigation, and is not to be answered at first sight,—whether there exists a knowledge altogether independent of experience, and even of all sensuous impressions? Knowledge of this kind is called à priori, in contradistinction to empirical knowledge which has its sources à posteriori, that is, in experience.

Source: The Principles of Science: A Treatise on Logic and Scientific Method (1874) Vol. 1, p. 14

“Information is not knowledge. The only source of knowledge is experience.”
According to Barbara Wolff, of The Hebrew University's Albert Einstein Archives, this is not one of Einstein's identifiable quotations. (Source: paralegalpie.com http://www.paralegalpie.com/paralegalpie/2009/11/did-anybody-really-say-that.html.)
The phrase "the only source of knowledge is experience" is found in an English-language essay from 1896: "We can only be guided by what we know, and our only source of knowledge is experience" (Arthur J. Pillsbury, "The Final Word" https://books.google.com/books?id=Mw9IAQAAMAAJ&pg=PA595&dq=%22only+source", Overland Monthly, November 1896). The thought can be seen as a paraphrase of John Locke's argument from his Essay Concerning Human Understanding: "Whence has it [the Mind] all the materials of Reason and Knowledge? To this I answer, in one Word, From Experience". (Locke, An Essay Concerning Human Understanding/Book II/Chapter I, 2.)
The phrase "information is not knowledge" is also found from the nineteenth century https://books.google.com/books?id=W2oAAAAAMAAJ&pg=PA59&dq=%22information+is+not+knowledge%22.
Misattributed
Source: 1950s, General Systems Theory - The Skeleton of Science, 1956, p. 197
“Experiment is the mother of knowledge.”
Source: A Wrinkle in Time: With Related Readings

Source: Human Nature and the Social Order, 1902, p. 36

In p. 144.
Sources, The Yoga Darsana Of Patanjali With The Sankhya Pravacana Commentary Of Vyasa