J. Krishnamurti (1895 - 1986) understood the paradox of trying to talk about something that is inexpressible. But he felt that he needed to find a way to get his message across to people. The most interesting thing about him is that the content of his message was not the message. What he tried to express was in the very act of discussing or of communion with people. In other words, the essence of his message was in the act of discovery and exploration together. To him, this was meditation, not the repeated effort to concentrate on a word or an image or any type of mental exercises. He thought all of that to be a form of ego-exaltation. His hallmark approach was to repeat his questions again and again, not necessarily in search of an answer that comes out of the intellect. Rather, he believed that by asking the question repeatedly, there would be some kind of stir or movement in the deeper parts of the mind. This repetition is a form of meditation.
There are many available videos of Krishnamurti speaking. Here is one as a brief introduction:
"It is no measure of health to be well adjusted to a profoundly sick society."
"If you leave the pool you have dug for yourself and go out into the river of life then life has an astonishing way of taking care of you, because then there is no taking care on your part."
"In obedience there is always fear, and fear darkens the mind."
"I maintain that Truth is a pathless land, and you cannot approach it by any path whatsoever, by any religion, by any sect."
"All ideologies are idiotic, whether religious or political, for it is conceptual thinking, the conceptual word, which has so unfortunately divided man."
"The man who lives without conflict, who lives with beauty and love, is not frightened of death because to love is to die."
"To live completely, wholly, every day as if it were a new loveliness, there must be dying to everything of yesterday, otherwise you live mechanically, and a mechanical mind can never know what love is or what freedom is."
"In the space which thought creates around itself there is no love. This space divides man from man, and in it is all the becoming, the battle of life, the agony and fear. Meditation is the ending of this space, the ending of the me."
"When one loses the deep intimate relationship with nature, then temples, mosques and churches become important."