What a double treat! Malachi and Matthew together today. Malachi offers some soul-searching questions (he does throughout the work) - today's: do I give God the best or the left-overs? That has to do not only with our offerings; it has to do with our time and with our prioritizing of our lives. The first chapter speaks of that wonderful pure offering that will be brought and which we know to be the preaching of the Gospel (and particularly as it is proclaimed at the Lord's table) and the life that it evokes (living sacrifices!) and so the incense of prayer offered to God across the length and breadth of world in the name of Jesus, our Mediator and High Priest.
In Matthew, we had the joy of St. John's fiery preaching of repentance and the admonition to bear fruits in keeping with repentance, and then the great Theophany at the Baptism of our Lord: the mystery of Father, Son, and Holy Spirit clearly shining forth as all righteousness is fulfilled with our Lord accepting the Baptism of sinners.