Jude, a servant of Jesus Christ and brother of James, writes to believers who are sanctified and preserved in Christ. He extends mercy, peace, and love to them. Jude emphasizes the need to contend for the faith, as false teachers have crept in, perverting God's grace and denying Jesus as Lord. He reminds them of God's judgment on the ungodly, using examples like Sodom and Gomorrah and fallen angels. Jude condemns the ungodly for their immoral behavior and disrespect for authority. He encourages believers to build themselves up in faith and love, awaiting the mercy of Christ. Jude calls for compassion and warns of God's judgment, glorifying God as the only wise Savior.