Jude calls Christians to "contend earnestly for the faith" against false teachers who twist grace into license. The book gathers vivid Old Testament warnings and ends with one of Scripture's most beloved benedictions to "him that is able to keep you from falling."
“It was needful for me to write unto you, and exhort you that ye should earnestly contend for the faith which was once delivered unto the saints.”
“Now unto him that is able to keep you from falling, and to present you faultless before the presence of his glory with exceeding joy.”