“Meditation is a state of mind in which the operation and exercise of will is not.”

The meditator is the observer, the senser, the thinker, the experiencer, and when there is the experiencer, the thinker, then he is concerned with reaching out, gaining, achieving, experiencing. And that thing which is timeless cannot be experienced. There is no experience at all. There is only that which is not nameable. ...You know, in all this there are various powers like clairvoyance, reading somebody’s thought — which is the most disgusting thing to do: it is like reading letters that are private. There are various powers. You know what I am talking about, don’t you? You call them siddhis, don’t you? Do you know that all these things are like candles in the sun? When there is no sun there is darkness, and then the candle and the light of the candle become very important. But when there is the sun, the light, the beauty, the clarity, then all these powers, these siddhis — developing various centres, chakras, kundalini, you know all that business — are like candlelight; they have no value at all. And when you have that light, you don’t want anything else.
The First Step is the Last Step (2004), p. 281
1970s, Krishnamurti in India, 1970-71 (1971)

"What is Meditation?" (2006)
Context: Mind without agitation is meditation. Mind in the present moment is meditation. Mind that has no hesitation, no anticipation is meditation. Mind that has come back home, to the source, is meditation. Mind that becomes ‘‘no mind’’ is meditation.

The Morals of Confucius http://books.google.pt/books?id=izgCAAAAQAAJ&printsec=frontcover&hl=pt-PT, 2nd edition (London, 1724), Maxim X, p. 114.
Attributed

The Great Treatise on the Stages of the Path to Enlightenment, as translated by Chenmo Translation Committee (2000) p. 99

"Third Talk at Rajghat" (25 December 1955) http://www.jkrishnamurti.com/krishnamurti-teachings/view-text.php?tid=527&chid=4846&w=%22Meditation+is+not+a+process+of+learning+how+to+meditate%22, J.Krishnamurti Online, JKO Serial No. 551225, Vol. IX, p. 192
Posthumous publications, The Collected Works

Source: "Theoretical assumptions and nonobserved facts," 1971, p. 3.

Women Saints of East and West

Talks in Europe 1968
1970s, Second Penguin Krishnamurti Reader (1973)
Context: What is important in meditation is the quality of the mind and the heart. It is not what you achieve, or what you say you attain, but rather the quality of a mind that is innocent and vulnerable.