Lesson 16: I have no neutral thoughts.
In Lesson 16 we find out that thoughts are never neutral. Neither are thoughts big or little, powerful or weak. “They are merely true or false.”
The idea of “idle thoughts” is an oxymoron: thoughts “give rise to the perception of a whole world” and are therefore capable of either churning out countless illusions or extending God’s Truth.

Photo by Ian Dyball
The world is a neutral thing, and the body is a neutral thing. But thoughts are what activates the darkness or light within the world and the body. This is why it is important to pay attention to fear thoughts: so that you can nip them in the bud.
Essentially, we come to realize that we can think with the delusional ego thought system, which never makes us happy. Or we can change teachers and think with the Holy Spirit, Who guides us out of the hell and insanity of the ego by shining an illuminated path back Home.