Jesus is in the midst of talking about the Pharisees and money, and suddenly he mentions divorce. What gives?
Remember, the Pharisees' hearts had drifted from God, and they looked to the letter of the law and tried to find loopholes to justify whatever behavior they wanted. For example, in those days, divorce was almost always initiated by the man, in which case he left his wife without income or social standing. There were religious teachers arguing that a man could divorce his wife for almost any reason, such as spoiling dinner. They were trivializing the covenant of marriage and leaving women incredibly vulnerable.
Jesus, as always, is looking out for the vulnerable. Just a chapter ago, we had the parables about how God sought out the lost coin and the lost son. The theme has not suddenly pivoted away from God racing to protect and embrace the vulnerable and those who have erred. Jesus is still welcoming and restoring, but he's also warning those who see people as disposable. He's rebuking religious leaders who are missing the point and using the law as a weapon against others and as a way to bolster their own power. He's pointing to the faithfulness of God, calling us all to reflect on the unfailing love of God and to seek to reflect that in every corner and aspect of our lives.
