2 Timothy3:14 says, But continue thou in the things which thou hast learned and hast been assured of, knowing of whom thou hast learned them; Paul told Timothy that he was to continue in the things that he had learned knowing whom he had learned them from. Though Paul may have referred to the fact that Timothy had learned from him, ultimately, he would have learned things from God by the leadership of the Holy Spirit. We may be taught by people today who teach God’s word faithfully but understanding comes from the Holy Spirit giving us knowledge to understand God’s word, and we should always remember this.
Verse fifteen adds, And that from a child thou hast known the holy scriptures, which are able to make thee wise unto salvation through faith which is in Christ Jesus. Paul said that Timothy had been taught God’s word since he was a child. We should teach God’s word to our children as well so that they might know what God says to us. Paul said knowing God’s word helped Timothy to understand the way to salvation. Just knowing God’s word is not enough. It must lead us to salvation by accepting Jesus Christ as our personal Savior and Lord.
Verse sixteen continues, All scripture is given by inspiration of God, and is profitable for doctrine, for reproof, for correction, for instruction in righteousness: Paul said that all scripture and not just certain parts was profitable for doctrine, reproof, correction, and instruction in righteousness. I believe for us this means the whole Bible, both the Old and New Testaments. We must understand the parts of the Bible in context of the whole Bible.
Verse seventeen concludes, That the man of God may be perfect, thoroughly furnished unto all good works. Paul said that understanding God’s word could make the man of God perfect by being thoroughly furnished to all good works. I don’t believe that this means anyone who considers themselves to be a preacher or even just a Christian will ever be perfect, but God’s word will show us how to be perfect in our faith. Then, we will be equipped to do all the good works God calls us to do, not for salvation, but to spread God's good news to others and to help other believers grow spiritually.