There is no more self-contradictory concept than that of idle thoughts. What gives rise to the perception of a whole world can hardly be called idle. Every thought we have either contributes to truth or to illusion.
How does one stay mindful? Where feelings are known as they arise, known as they persist, known as they pass away. Thoughts are known as they arise, known as they persist, known as they pass away. Perceptions are known they arise, known as they persist, known as they pass away. This is how a monk stays awake.
In exactly the same way, ... scatter your body, your feeling, your perception, your predispositions, your discriminative consciousness, break them up, knock them down, cease to play with them, apply yourself to the destruction of craving for them. Verily, ... the extinction of craving is Nirvana.
Monks, we who look at the whole and not just the part, know that we too are systems of interdependence, of feelings, perceptions, thoughts, and consciousness all interconnected. Investigating in this way, we come to realize that there is no me or mine in any one part, just as a sound does not belong to any one part of the lute.
What is this world condition? Body is the world condition. And with body and form goes feeling, perception, consciousness, and all the activities throughout the world. The arising of form and the ceasing of form-everything that has been heard, sensed, and known, sought after and reached by the mind-all this is the embodied world, to be penetrated and realized.