I've found that plucking words from paragraphs has, on occasion, brought them more firmly under my control-- most of them remain mysterious to me when they pop

I've found that plucking words from paragraphs has, on occasion, brought them more firmly under my control-- most of them remain mysterious to me when they pop up in papers on programming or psychology. Rather than list "ideas" or "concepts" I try to make a record of what appeared and the response I had to its appearance. How are we to solve difficult problems if we stop mentioning them or their difficulty?