Ephesians 4:1-7,11-13; Psalm 18(19):2-5; Matthew 9:9-13
Mathew's Gospel might be said to be a catechist's handbook, written to help those who wanted to pass on their faith to others. It is very well organised, perhaps Matthew was a school teacher? The famous scene in which Matthew is called, only says that Matthew was sitting by the tax office - it does not specifically say Matthew was a tax collector! Matthew was most probably part of the Jewish - Christian diaspora, and sensing that this was a difficult, maybe even failing evangelisation, probably wrote his Gospel with Mark's to hand. He added a layer of Jewish knowledge and thought, so that it would be both an encouragement to the christian Jews, and also be referencing as a starting point their accumulated knowledge and belief in God.
He frequently tells us that Jesus fulfils the law - in other words, everything the Jewish people were expecting was happening in their presence in Jesus' life. However - they certainly did not all accept this, and it is clear from Matthew that an argument was taking place. Perhaps there still is!
Matthew often compares Jesus to those about him, contrasting their thoughts and deeds with those of Jesus. Should we compare our lives with those around us, and ask ourselves if we are different?