Thoughts are fleeting. 15 minutes could be filled with hundreds or thousands of distinct concepts. Not to mention active recording is different from passive observation.

Yes, but it could be expensive.

I found it completely useless in my therapy seasons. These trains of thoughts are more like hallucination than real thoughts, because you think different at writing than during the day. I’m not even sure if keeping a diary makes you understand yourself better or just become more coherent with your delusions.

> you think different at writing than during the day

This might not be everybody. I don't feel that way.

> keeping a diary makes you understand yourself better or just become more coherent with your delusions

That might be true, but once they're coherent are they still delusions? I call those plans.