I wonder how many people hearing this quoted wonder what on earth we’re talking about?  In the Book of Common Prayer the Collect for the Last Sunday after Trinity began with the words “Stir up O Lord….”  Stir up the wills of the people, of course, but it came at just the time when we were all “stirring up” our Christmas puddings. If you hadn’t made your cakes and puddings by “Stir-up Sunday” you were behindhand and they wouldn’t mature.  It was so missed when it was dropped in favour of the new Collect that it had to be added as the post-communion prayer for the Sunday now called “Christ the King”.  Christmas puddings are a serious business.