In the account of Naaman and God curing him of his leprosy through Elisha, we see that we need to humble ourselves before God and His sovereignty. God doesn't do what we want the way we want Him to as though we had any say - God is in control, and we need to be willing to obey His voice even when it goes contrary to what we think is best.
It is also a picture of the gospel message. We see a man in need, he hears the message of good news from the servant girl, there is supernatural deliverance, there is a work of grace, there is a command to obey something seemingly absurd, there is faith (however weak or halting it may be), there is a baptism, and a confession of the Lord as God.
We see from Gehazi, the dire consequences of sin - in his case greed and deceit. We cannot hide our sin from God. We reap what we sow.
The account of the floating axe shows that God cares about every detail in our lives.
The account of Elisha's servant being able to see the supernatural is a great reminder to us that there is such an unseen world - and that we have to have faith without seeing it by sight, or we will live in spiritual blindness until it is too late.
The portion in Matthew that stood out to me was that a tree is known by it's fruit. What kind of fruit am I producing?
Tomorrow's Bible In a Year Passage passage: 2 Kings 7-9; Matthew 13:1-30