Writing is thinking

Writing notes in zettelkasten form is thinking. The notes are just the outcome of the thinking

When we read, and try to rewrite it in our own words, we are actually thinking about it.
Writing facilitates thinking, learning, understanding and generating new ideas.
If you want to put something in your head, they have to be translated into our own words.
THere is evidence that writing can benefit our health: “translating emotional events into words leads to profound social, psychological, and neural changes.” in these studies, writing about ones inner experience led to reduced visits to doctors, less work absenteeism.

“Notes on paper, or on a computer screen [...] do not make contemporary physics or other kinds of intellectual endeavour easier, they make it possible,” neuroscientist Neil Levy concludes in the introduction to the Oxford Handbook of Neuroethics, summarizing decades of research.