You can't sleep. You're trying to figure out why. You think about the meeting. You think about the financial decision. You think about the conversation that didn't go well. You're trying to think your way to rest. Three hours later you're more awake than when you started.
K had a particular irritation with this. The very faculty that produced the problem is being asked to dissolve it. Thought built the anxiety. Now thought is being assigned to solve the anxiety. The arsonist is being asked to put out the fire. The arsonist has only the technology of starting fires.
Most self-improvement runs on this contradiction. The thinking that organized you into your current trouble is the thinking you bring to fix it. The same machine. The same biases. The same blind spots. The "better me" that does the fixing is the "me" wearing a slightly different costume. The fragment, redecorated.
The looping is the giveaway. When thought tries to solve something thought built, the loop is the diagnostic. You've gone over the same ground six times tonight. The ground isn't getting smaller. The loop is the system trying to fix itself with itself.
Real exit from the problems thought creates requires something that isn't thought. K called it insight, awareness, intelligence. Words for the move thought can't make. The thinking can keep going. It just can't be where the answer comes from.