In the movie "Julie and Julia" one of them makes a comment about the wonderful predictability in cooking. I know just what they mean. I find it very grounding on a day when technology is causing hassles and tech support is no help (or I am tech support), to come into the kitchen. I know for a certainty that mixing flours, water and natural yeasts in the form of my own mature sourdough culture will result in a satisfying fermentation that will eventually come out as wonderful loaf of warm bread. When everything else in the world seems to be going pear shaped, this age old practice is satisfying and calming.