【雜】If you cannot explain what you are attempting to accomplish to a sixyear-old child, then you are probably not clear about it yourself.

你怎麼會這樣想!?

如其在上 as above, so below – 甲 子 之 心

唐鳳：如何高效率自學？解決自己感興趣的問題【每日唐鳳】