The theology of Hebrews is rooted in the Old Testament. In fact, there are several mini-commentaries on Old Testament texts: Psalm 2 in Hebrews 2, Psalm 110 in Hebrews 5–7, Jeremiah 31 in Hebrews 8–9, Psalm 40 in Hebrews 10, and Psalm 95 in Hebrews 3–4. In these two chapters (Hebrews 3 and 4), the author is warning against unbelief. And so the writer quotes from Psalm 95: “Today, if you hear his voice, do not harden your hearts as [you did in the rebellion]” (vv. 7–8).
