I like this bit in ‘English Bread and Yeast Cookery’ by Elizabeth David. It reminds me that a good loaf (or beer) is something to say thanks for, a gift of grace.
“In Chaucer’s England one of the names for yeast or barm was goddisgoode ‘bicause it cometh of the grete grace of God.’These words imply a blessing. To me that is just what it is.It is also mysterious, magical.No matter how familiar its action may become nor how successful the attempts to explain it in terms of chemistry and to manufacture it by the ton, yeast still to a certain extent retains its mystery.”