At the end of a breath, notice that the breath is over. Gone. As a sound fades away, notice when it is over. Gone. At the end of a thought, notice that the thought is over. Gone. At the end of an experience of emotion—joy, anger, sadness, or anything else—notice it is over. Gone.

From “Joy on Demand: The Art of Discovering the Happiness Within”
by Chade-Meng Tan