The Commonplace Fire: On the Radical Sameness of Erasmus's Scissors
We speak of our digital tools in the language of revolution. We curate feeds, we capture thoughts, we build a 'second brain'—all with the fervour of pioneers discovering a new world. But this impulse, the desire to externalise and organise knowledge, is one of the oldest fires we tend. To find its purest, most pragmatic flame, we need not look to a futurist, but to a 16th-century scholar and his scissors.
In 1512, Desiderius Erasmus, the great humanist, did not write a manifesto on personal knowledge management. He wrote a textbook for schoolboys, De Copia, and within it, he laid out instructions for keeping a commonplace book. This was not a diary of feelings, but a tactical ledger for the mind. His method was brutally simple: read with a pen and scissors at hand. When you encounter a striking passage, a potent quote, or a useful example, you do not merely underline it. You cut it out. Literally.
Erasmus advocated for the physical excision of text from its source. These clippings, these loci communes or 'common places', were to be pasted into a blank book, organised under headings of one’s own devising: Virtue, Vice, Fate, Beauty. The act was not one of preservation but of transformation. By severing a line from its original context and placing it next to a line from a completely different work, the reader created new meaning. They became an author of a new, composite text built from the wisdom of others.
This is the historical mirror to our own endless tab-saving and note-clipping. Erasmus understood what we often forget: that curation is not a passive act of hoarding, but an aggressive act of creation. The value isn't in the pile of clippings; it's in the forced decision of where to file them. To assign a heading is to already begin the work of interpretation, to build a conceptual scaffold upon which future thought can hang.
We imagine our digital tools grant us uniqueness, but Erasmus’s method reveals a comforting, radical sameness. His scissors perform the same function as our 'Copy to Notion' plug-in. His headings are our tags and databases. His final commonplace book, a personalised sourcebook for writing and rhetoric, is the ancestor of every digital garden we now plant. The tools change, but the human compulsion—to collect, categorise, and recombine—burns just as brightly.
Perhaps then, the lesson isn't in seeking the next revolutionary app, but in embracing the ancient ethos behind the method. Are we, like Erasmus’s students, actively cutting and categorising with intent? Or are we merely amassing a hoard of disconnected fragments, a library of unsorted clippings? The goal was never the accumulation of knowledge, but its ignition. The fire starts not with the saving, but with the sorting.
Notes & further reading
A few pages I came back to while writing this: