In last week’s passage, Paul reminds Timothy of his upbringing, and how he had been taught the Scriptures since childhood. In that passage, he states again the relationship between the Scriptures and salvation. From there, he state just how critical the words of God are for ministry, giving Timothy a brief explanation of their origin.
You can see this week’s passage in 2 Timothy 3:16-17:
In this passage, Paul gives what has become one of the most often quoted sections of Scripture concerning Scripture itself. The point Paul is making here is that Timothy should continue in the Word, just as he was raised in the Word. The main reason for this is that Scripture is of divine origin; it is from God himself!
Some understand Paul to be referring only to Old Testament Scripture here, since that is what he knew, and the New Testament wasn’t fully written yet (and much of it was written by Paul himself, anyway). However, in 1 Timothy 5:18, Paul refers to Luke’s gospel as Scripture, and in 2 Peter 3:15-16, Peter includes Paul’s writing in the category of Scripture. So a strong argument can be made that this passage to Timothy includes both Old and New Testament writings.