Isaac was an adult at the time when Abraham took him to Mount Moriah to be sacrificed. Josephus says he was twenty-five (Antiquities I, 13, 2). This means that Isaac is Christological in the sense that he willingly allowed himself to be sacrificed as a covenantal first-born son.

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2 Chron 3:1 identifies Mount Moriah with Jerusalem – further strengthening the connection between Christ and Isaac who is described as carrying the wood upon his back, just as Christ carried the wood of the cross.