Most of us are trained to believe that if we think something is good, it is good, and if we think something is bad, it is bad. But as we practice simply watching our thoughts come and go, such rigid distinctions begin to break down. If we continue to simply allow ourselves to be aware of the activity of our minds, we’ll very gradually come to recognize the transparent nature of the thoughts, emotions, sensations and perceptions we once considered solid and real. It’s as though layers of dust and dirt were slowly being wiped away from the surface of a mirror

Yongey Mingyur Rinpoche