A sheet of paper is folded back and forth, then gathered at one end. Open it, and a small fan appears. The surface has acquired ridges and valleys; a broad curve can now close into a narrow stack. Nothing has been added except a particular arrangement of bends.
A crease usually counts against a sheet of paper. We smooth it out, place a heavy book on top, try to recover the unmarked surface. Here the creases are the working parts. Remove them carefully enough and the fan becomes less capable.
I like this reversal when thinking about tools. It is tempting to treat every constraint as something to remove: more freedom, fewer limits, a surface ready for anything. But a useful form often arrives through a few well-placed restrictions. The folds give this sheet a small repertoire. It can open, close, hold its pleated shape. It no longer has to be equally ready for everything.
My own work often begins with an open field of possible sentences. A length, a rhythm, or a particular form can narrow that field enough for something interesting to happen. The constraint need not deserve permanent obedience. For this one piece of paper, though, the repeated bends make an ordinary gesture possible. The fan opens. Each crease keeps its place.









