From Mindfulness in Plain English by Bhante Henepola Gunaratana, Chapter 16 ("What's in It for You"):

Once your mind is free from thought, it becomes clearly wakeful and at rest in an utterly simple awareness. This awareness cannot be described adequately. Words are not enough. It can only be experienced. Breath ceases to be just breath; it is no longer limited to the static and familiar concept you once held. You no longer see it as a succession of just inhalations and exhalations, an insignificant monotonous experience. Breath becomes a living, changing process, something alive and fascinating. It is no longer something that takes place in time; it is perceived as the present moment itself. Time is seen as a concept, not an experienced reality.

This is simplified, rudimentary awareness which is stripped of all extraneous detail. It is grounded in a living flow of the present, and it is marked by a pronounced sense of reality. You know absolutely that this is real, more real than anything you have ever experienced. Once you have gained this perception with absolute certainty, you have a fresh vantage point, a new criterion against which to gauge all of your experience. After this perception, you see clearly those moments when you are participating in bare phenomena alone, and those moments when you are disturbing phenomena with mental attitudes. You watch yourself twisting reality with mental comments, with stale images and personal opinions. You know what you are doing, when you are doing it. You become increasingly sensitive to the ways in which you miss the true reality, and you gravitate towards the simple objective perspective which does not add to or subtract from what is. You become a very perceptive individual. From this vantage point, all is seen with clarity. The innumerable activities of mind and body stand out in glaring detail. You mindfully observe the incessant rise and fall of breath; you watch an endless stream of bodily sensations and movements; you scan the rapid succession of thoughts and feelings, and you sense the rhythm that echoes from the steady march of time. And in the midst of all this ceaseless movement, there is no watcher, there is only watching.

In this state of perception, nothing remains the same for two consecutive moments. Everything is seen to be in constant transformation. All things are born, all things grow old and die. There are no exceptions. You awaken to the unceasing changes of your own life. You look around and see everything in flux, everything, everything, everything. It is all rising and falling, intensifying and diminishing, coming into existence and passing away. All of life, every bit of it from the infinitesimal to the Pacific Ocean, is in motion constantly. You perceive the universe as a great flowing river of experience. Your most cherished possessions are slipping away, and so is your very life. Yet this impermanence is no reason for grief. You stand there transfixed, staring at this incessant activity, and your response is wondrous joy. It's all moving, dancing and full of life.

(cf. Unselfing (2009-01-04), Bind the Monkey (2001-11-21), The Watcher (2010-11-15), Like a TV Screen (2010-12-13), Let the Mind Pass By (2010-12-28), Turning Attention Inward (2011-04-17), Watching Things (2012-02-11), ...) - ^z - 2016-10-07