Though Jude’s letter up to this point has been about the dangers of apostasy and those who are false teachers, Jude also has some helpful things to add in verses 17-23 about the best kind of counter-attack to false teaching. By using our minds and bringing to mind the teachings of the apostles, we will be able to recognise error. By giving due to attention to our hearts and keeping ourselves in the love of God and devoting ourselves to prayer, we will find God’s strengthening. By using our words to warn the lost and speak of the grace of Christ, we will also be able to share what we have found in Jesus. By doing these well we will be enabled to guard the precious treasure that is the gospel.