…a Greek word with several translations into English including a reminder, a note, a public record, a commentary, a draft, a copy, and other variations on those terms.
The context was Marcus Aurelius’ Meditations, but it sounds like a good description of Tumblr, Twitter, and a number of wonderful things on the internet. I first came across hypomnemata (sleep + thread…) in The Present Alone is Our Happiness (recommended in Ryan Holiday’s super awesome reading list email archive).
Reading the Wikipedia entry, it made me realize what I often (mostly?) use this Tumblr for: to make notes to myself, shaping and re-shaping my perspective. Many of my favorite posts (tagged, e.g., work, opinions, empathy, arguments, happiness, death, travel, thinking, philosophy, stoicism, psychology) function as a sort of admonishment that I really do re-read every now and then. It’s an attempt to refresh and re-calibrate, internalize. This journaling/commonplacing thing isn’t new, but there’s something satisfying about knowing that one strand of the tradition goes back to an old Greek word. See also commentarii, commonplace, memoranda.