We first look at a promise of God to treat us the same way we treat others. We see that if we take care of the poor then God will take care of us in our time of need. Or, in more general terms, if we obey God He will bless us.
Next we see that if we sin against God, and we are one of His children, then He will discipline us in order to turn us back to the path of obedience.
We see how this passage predicts events in the life of the Messiah and consider that God’s blessings come to us not on the basis of our works, but because of the work of Jesus.