“Only knowledge that is used sticks in your mind.”

Collected Works, Vol. 31.
Collected Works

Source: Sayings of Sri Ramakrishna (1960), p. 138

Nan Yar = Who am I?

Source: 1970s, Krishnamurti in India, 1970-71 (1971), p. 56
Context: So you must ask this question, put this question to yourself, whether your mind can be empty of all its past and yet retain the technological knowledge, your engineering knowledge, your linguistic knowledge, the memory of all that, and yet function from a mind that is completely empty. The emptying of that mind comes about naturally, sweetly without bidding, when you understand yourself, when you understand what you are. What you are is the memory, bundle of memories, experiences, thoughts. When you understand that, look at it, observe it; and when you observe it, see in that observation that there is no duality between the observer and the observed; then when you see that, you will see that your mind can be completely empty, attentive, and in that attention you can act wholly, without any fragmentation.

“Heliotrope”, p. 106.
The Teachings of Don. B: Satires, Parodies, Fables, Illustrated Stories, and Plays of Donald Barthelme (1992)

Source: Mind is a Myth (1987), Ch. 1: The Certainty That Blasts Everything
Context: Our mind (and there are no individual minds — only "mind", which is the accumulation of man's knowledge and experience) has created the notion of the psyche and evolution. Only technology progresses, while we as a race are moving closer to complete and total destruction of the world and ourselves. Everything in man's consciousness is pushing the whole world, which nature has so laboriously created, toward destruction. There has been no qualitative change in man's thinking; we feel about our neighbours just as the frightened caveman felt towards his. The only thing that has changed is our ability to destroy our neighbor and his property.

Radio From Hell (May 1, 2007)