“There is nothing passive about mindfulness. One might even say that it expresses a specific kind of passion—a passion for discerning what is subjectively real in every moment. It is a mode of cognition that is, above all, undistracted, accepting, and (ultimately) nonconceptual. Being mindful is not a matter of thinking more clearly about experience; it is the act of experiencing more clearly, including the arising of thoughts themselves.

“Mindfulness is a vivid awareness of whatever is appearing in one’s mind or body—thoughts, sensations, moods—without grasping at the pleasant or recoiling from the unpleasant. One of the great strengths of this technique of meditation is that it does not require us to adopt any cultural affectations or unjustified beliefs. It simply demands that we pay close attention to the flow of experience in each moment.”

from Waking Up – A Guide To Spirituality Without Religion