Contemplation what thinking energy-phenomena is on itself, can really be subtle. It reveals subtle mind cheatings by digging in the mud of grasping, choosing creations related to objects. Those objects are a reflection of mind.
Ego-clinging get birth in it. Like an oister protecting itself when its' mantle is been irritated by something, the oister makes a pearl is me said. A pearl of ego?
In one approach, awareness, the thinking energy appears as wisdom and thoughts are having their own purifying power. In wisdom thoughts are not having a deluded quality. They are empty, arise spontaneous and can feed our awareness.
Practical example Mingyur.
The essence of the minds of sentient beings interpenetrate without obstruction. They are vast like space, deep like the ocean. Being like space, their essence is the equal everywhere, with no distinctive marks to be apprehended.