Jude

The author of this book is Jude, who is the half-brother of Jesus. He believed in Jesus after His resurrection and became a leader among the Jewish Christian community. He was also an itinerary preacher.
 
The letter was for the Jewish Christian community, who was facing the problem of corrupted teachers.  According to Jude, these teachers were morally compromised, especially when it came to money and sex. They abused God’s grace as an excuse to sin. After Jude found out, he addressed the problem with immediate attention. 
 
Jude pointed out that these corrupted teachers had rejected Jesus by distorting the gospel and His authority. Jude used much Old Testament and other scriptures to give warning about the seriousness of this issue. He demanded that the church to deal with the issue. At the end of the book, Jude taught the church to stand up for pure faith. Jude also encouraged them to build their foundation on the gospel of Christ, and to build the church with prayer and obedience in Jesus’ teaching.  Finally, the church was called to stay alert, instead of following the teaching of corrupted teachers. 
 
The purpose of this book: to emphasize that God’s grace requires us to respond with our entire life.