Abstract: This essay makes a compelling argument for Jacob, the brother of Nephi, having deep knowledge of ancient Israelite temple ritual, concepts, and imagery, based on two of Jacob’s sermons in 2 Nephi 9 and Jacob 1-3. For instance, he discusses the duty of the priest to expiate sin and make atonement before the Lord and of entering God’s presence. Jacob quotes temple-related verses from the Old Testament, like Psalm 95. The allusions to the temple are not forced, but very subtle. Of course, Jacob’s central topic, the atonement, is a temple topic itself, and its opposite, impurity, is also expressed by Jacob in terms familiar and central to an ancient temple priest. The temple is also shown as a gate to heaven.