A cursory glance at Hebrews’ critique of Israel’s fear at Sinai in Heb 12:18–29 suggests that the author has misunderstood or manipulated his sources. In the Pentateuch, the appointment of Moses as Israel’s mediator following their unwillingness to stand too close to YHWH receives explicit approval (Deut 5:28), while Heb 12:25 labels that request for mediation a “refusal” to heed the word of God spoken to them from the mountain. In this dissertation I argue that Hebrews’ use of the Sinai narratives resides on a complex trajectory established by four points: the Sinai covenant according to Exodus, the reenactment of that covenant according to Deuteronomy, the call for a new covenant according to Jeremiah, and the present reality of that new covenant established by God and mediated by Jesus Christ.