Those first bubbles were almost a revelation. A couple of days before, I had mixed together flour and water into a paste. But now pockets of gas percolated through that seemingly inert glob. It was breathing. It was alive.
This gloppy mess, exuding a whiff of vinegar, was my nascent sourdough starter. When mature, it would be a pungent brew of yeasts and bacteria, a complex ecosystem that would hopefully yield delicious loaves of sourdough bread.