Paul uses the Greek term theopneustos here (meaning “God-breathed”) to assure Timothy that Scripture is, in fact, from God. Although God used people to produce the Scriptures (2 Pet 1:20–21), their ultimate origin is God. By contrast, the false teaching that Timothy opposed comes from evil forces who spread their doctrine through errant teachers (1 Tim 1:3–7; 4:1).
Admitting to God’s authorship is an acceptance of his authority over every aspect of life. By stating that Scriptures are God breathed, Paul established the Bible’s claim as God’s authoritative Word over all people.