Although the first Sunday in Advent doesn't fall until 3 December this year - as late as it can fall, this evening is the first of 4 Wednesdays leading up to Christmas when the churches in Dimboola have ecumenical services of the Word to mark Advent. This year, the Lutherans are first cab off the rank, and we get to do Advent before the first Sunday in Advent!
The Scripture readings for the first Sunday in Advent tend to bridge the idea of the coming Christ as judge and king (that the last couple of weeks have emphasized) to the coming Christ as the baby in the manger in Bethlehem. To get into the right frame-of-mind ("O how shall I receive thee?") we need to identify the coming babe in the manger as the lord of the universe. Only then are we ready to hear the words of the Baptist (next week) and so on, building our anticipation until we get to the festival that is Christmas.