The first letter to Timothy gives the Apostle Paul’s instructions to a young pastor. Timothy’s job was to teach people the gospel and urge people to trust Jesus Christ and live thankful lives in obedience to the one who rescued them from sin and death.
In reminding Timothy of his responsibilities, Paul first deals with false ideas that must be corrected.
These false ideas embolden people to abandon the good news (and so becoming ‘shipwrecked’), and instead to trust in their pedigree or their keeping of God’s law. This is why Paul refers to the vanity of genealogies (my mum/dad was so-and-so, and so I’m fine) and the unlawful use of the law (I did such-and-such, and so I’m fine).
Paul indicates that the law is not for good people, because the only person whose whole life may be called ‘good’ is our Lord Jesus Christ. The law is for bad people like us.
Paul then gives a list of bad behaviour of which the law is intended to convict us. We need to know our ‘bad’ before we can see the ‘good’ in the gospel.
In this list, Paul identifies bad attitudes and actions: disrespect for God, lack of submission to him, slanderous talk, murder of parents (the extreme end of ‘not honouring’), sexual sins, kidnapping, lying and the rest.
Paul says that church people who are indulging any of these sorts of sins are acting against pure teaching. That is, either they do not really believe that the law applies to them, or that they think God’s free mercy in Christ is a licence to do any wicked thing that they might wish.
In opposition to this, Paul says that God’s mercy to bad people like him (Paul called himself the ‘chief of sinners’) creates real changes in the attitudes and behaviours of those who are in Christ. While we are still sinners, we become saints by the new birth. We should be people who keep confessing and turning from our sins, not people who glory in our sins.
If the Lord Jesus Christ, who became a man to live a truly good life to replace our bad lives, to die in order to take responsibility for our sin, and to rise to give us righteousness so that we are pleasing to God — if Christ did all that for us, and we know it — then our lives ought to be conformed more and more to his pattern. He saves bad people that they might do good in this world for his glory.
As Paul writes elsewhere, there is no room for Christian boasting, except boasting of Christ and his doing, dying and rising for us. Timothy’s job was to remind church people of these things.