Collect for Second Sunday of Advent: Stir Up Sunday

This is the collect for the Second Sunday of Advent in the Extraordinary Form. It is also the prayer we say (this week) after singing O Come O Come Emmanuel around our Advent Wreath.

Stir up our hearts, O Lord, to make ready the ways of thine only-begotten Son; and with minds undefiled to pay to thee the homage of our service.

The opening words lead to this being called Stir Up Sunday, (at least in our family - I have heard others have a different Stir Up Sunday). Anyway, it is the day to stir the Christmas Pudding mix...