The Apostle Paul's mission work in Corinth serves as a case study for the principle: God's Word works. Some reject the Word, but some are brought to faith.
The Law of God shows our sin and announces the penalty for our law-breaking: death. But thanks be to God, through Jesus, he has given us victory over sin and death.
Joseph learned through his life that God works good from bad. Joseph was able to forgive his brothers’ evil hatred because he understood this: if God forgives, we will also forgive.
Jacob had learned the lesson: trusting God was the only way. When Jacob was worried about reuniting with his brother Esau, he went to God in prayer and demanded God's blessing, on the basis of God's own grace and promises.