Scripture makes it clear that unlike the conceptions of Abraham and of Jacob, Isaac was conceived through divine agency. Like the Mycenaean Greek heroes, Isaac could claim paternity at two levels; the human and the divine.... Normative Judaism has divested itself of this approach to the paternity of heroes, in spite of the tell-tale text in Genesis. Midrash does not hesitate to call Moses half-god and half-man.... The Church tradition that connects the sacrifice of Isaac with the sacrifice of Christ apparently rests on a sound exegesis, for the sacrifice of Isaac would have meant not only the sacrifice of Abraham's son but of God's.

Ch.VIII Further Observations on the Bible - The Common Background of Greek and Hebrew Civilizations (1965 [1962])