Matthew 12:31

Matthew 12:31 "Therefore I tell you, every sin & blasphemy will be forgiven people, but the blasphemy against the Spirit  will not be forgiven." commentary- Quite simply if you disrespect God & speak ill of Him, that sin cannot be forgiven. This verse comes from a section that specifies how people thought Jesus's healings & good works on the sabbath were due to him being possessed by Satan. He replied to those critics letting them know Satan can't battle & defeat himself. People were looking at the law rather than the heart & the intent. Good is done & people focus on human perspective.

Matthew 1:1

Matthew 1:1 "The book of the  genealogy of Jesus Christ, the son of David, the son of Abraham." commentary- If your read through this chapter you will the genealogy of Jesus. So many names jump out from the compilation, such as Abraham, Isaac, Jacob, Boaz and Ruth, David and Solomon. There were no perfect people in the  genealogy. There is imperfection and sin and mess ups. But even those blemishes could not stop what God had ordained which is the conception and eventual birth of Christ. Even if your family is plagued by sin, God can do something amazing.