Lame Deer, Medicine Man of the Oglala people is attributed to have said this.
"Whenever we're thinking, our experience is being filtered through our minds. For example, when I say to myself, "What a beautiful sunset!" I am not fully experiencing the sunset because I am involved with the words in my mind.
Explore letting go of the thoughts, the words, and connecting directly with your experiences. Tune in to the silence and the sensations in your body. Be aware of the spaciousness this brings because this is truly living in the present moment.
Being present doesn't mean that we have to abandon thinking entirely. That's not feasible, of course. But we can experiment with what it's like to stop thinking once in a while!"
"Only in quiet waters things mirror themselves undistorted. Only in a quiet mind is adequate perception of the world."
Good luck to you and cheers!
I don't know who said it, but I think it's bullshit.