2 Tim. 3:14-17 (ESV)
But as for you, continue in what you have learned and have firmly believed, knowing from whom you learned it  and how from childhood you have been acquainted with the sacred writings, which are able to make you wise for salvation through faith in Christ Jesus.  All Scripture is breathed out by God and profitable for teaching, for reproof, for correction, and for training in righteousness,  that the man of God may be competent, equipped for every good work.
What you have learned and firmly believed. Is it possible? Many today are lulled into a shaky faith. They believe as posted earlier this week that they can’t know truth. Even Christians have this concept, “well, no one can be completely right.” You may be closer to right than another, but you are never right, according to many. This is just awful. Christ is the truth, God is a God of truth. He does not breath lies. We can and should know truth, even as we believe it firmly. Without this it matters not if scripture is inerrant, or infallible. So many give us Lutheran’s lip service in agreeing with us that it is inerrant, and infallible. But then they deny that it is good for anything! They deny that they can thereby know truth. They do not believe that scripture is profitable for teaching, reproof, for correction, and training in righteousness, unless they get that righteousness confused with following the law. That is always the default. They don’t believe what Christ says about the sacraments, and the gospel becomes about living the righteous life of pagans, nothing more than following the law, being obedient to Christ. I don’t advocate disobedience to the law, yet there is no righteousness found there. The Law works hand in hand with sin and death. “The sting of death is sin, and the power of sin is the law.  But thanks be to God, who gives us the victory through our Lord Jesus Christ.” (1 Cor. 15:56-57 (ESV)
There is no life in trying to live an obedience to the law, though that is not a bad thing either. There is just no life there. The life, the righteousness, is the victory God gives us through our Lord Jesus Christ, believing in Him, and believing Him. We can know this, and knowing this, we should teach, reproof, correct, and train in righteousness. Train people to fall back on Christ, not the law.