3Blue1Brown is amazing -- one of the best math explainers I have seen. He also had a good video on other math channels he likes (https://www.youtube.com/watch?v=VcgJro0sTiM). It's amazing to see how things have changed over the last couple of years. Earlier, searching for math explanations on YT, I felt like I mostly saw hard-to-follow lectures. Now there's tons of content created specifically for YT and it is really well done.

3Blue1Brown saved me when I started university comp sci math 10 years after highschool. One of my favorite youtube channels. His Fourier Transform videos are the best explanations I've seen.

Sidenote: 3Brown1Blue has the most intuitive explanations for linear algebra and matrix operations I have found thus far. Check his playlists series.

I don't watch YouTube much but I have see a few of these videos. This one was recommended to me last night and I watched it. Now it's here on HN the next morning. This is certainly not a coincidence.

Favorite quote "You can often view glimpses of ingeniousness... not as inexplicable miracles, but as the residue of experience." Did he pen that one or borrow it from someone else?

Google doesn't recognise "residue of experience" as part of a familiar quote, but the phrase itself seems to be rather frequent, at least in academese: https://www.google.com/search?q=%22residue+of+experience%22.

Funnily enough, as of this writing, the top ranked google result (at least for me) is this post.

While Redditisms leaking into HN comments are usually downvoted, I actually got this for the first time just now. Probably because while on HN I wear my thinking cap, and on Reddit I read mainly for amusement and don't spend the time to look as closely. So a qualified thank you, that was clever.

It was popularized by Douglas Hofstadter, the guy who wrote Gödel, Escher, Bach among other things. https://en.wikipedia.org/wiki/Douglas_Hofstadter

vorite quote "You can often view glimpses of ingeniousness... not as inexplicable miracles, but as the residue of experience." Did he pen that one or borrow it from someone else?

Although I can't say it hasn't been said before, that's a common theme in his videos.

'Reside of experience'. Yes, more especially the residue of imaginative experience.

Daydreaming can be dysfunctional & defensive, as in:

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5962718/

Yet some people are free in their thoughts at least some of the time and thus are able to daydream productively.

(One difference I think is that they are obsessed with problems).