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While at Dr. Hahn's, one of the things he discussed was the significance of the debate surrounding the so-called "pistis Christou" passages in the New Testament (Rom. 3:22, 26, Gal. 2:16; 3:22, Eph. 3:12, Phil 3:9). Taken subjectively, Saint Paul's Greek phrase "pistis Christou" can mean "the faith of Christ". Taken objectively, it's closer to "faith in Christ".
The distinction is rather important. Take for example Galatians 2:16:
Knowing that a man is not justified by the works of the law, but by the faith of Jesus [subjective translation] Christ, even we have believed in Jesus Christ, that we might be justified by the faith of Christ [subjective translation], and not by the works of the law: for by the works of the law shall no flesh be justified.The subjective translation above makes the faith in question the faithfulness of Christ. I'm open to this reading but with a caveat. We must never never attribute the theological virtue of faith to Christ. This is why I favor "faithfulness" if we must opt for the subjective genitive version of the phrase pistis Christou.
Why can't Christ have "faith"? Saint Thomas Aquinas explains:
As was said above (II-II, 1, 4), the object of faith is a Divine thing not seen. Now the habit of virtue, as every other habit, takes its species from the object. Hence, if we deny that the Divine thing was not seen, we exclude the very essence of faith. Now from the first moment of His conception Christ saw God's Essence fully, as will be made clear (34, 1). Hence there could be no faith in Him (STh III q. 7, a. 3)As the consubstantial Logos, Christ always sees the Divine Essence, even after his incarnation, even on the cross, even in his descent into hell. As Hebrews states, "Faith is the evidence of things unseen" (Heb 11:1), yet Christ always saw perfectly the object of faith. Consequently, Christ does not have "faith" in the strict sense since there is nothing "unseen" to Him.
If you're interested in the subjective/objective debate concerning Saint Paul's phrase "pistis Christou" below is a great little bibliography arranged by Zeba Antonin Crook (Ph.D. Cand) at the University of St. Michael's College Ontario, Canada (FYI, Crook favors the subjective genitive interpretation):
Pistis Christou Bibliography
Dunn, J.D.G., "Once More: Pistis Christou," _SBL 1991 Sem. Papers_
(Atlanta" Scholars, 1991) pp. 730-44.
Hay, D.M., "Pistis as 'Ground for Faith' in Hellenized Judaism and
Paul," _JBL_ 108 (1989) : 461-76.
Hays, R.B., "Pistis and Pauline Christology," _SBL 1991 Sem. Papers_
(Atlanta" Scholars, 1991) pp. 714-29
Hebert, G., "'Faithfulness' and 'Faith,'" _Theology_ 58 (1955) :
Hooker, M.D. "Pistis Christou," _New Testament Studies_ 35 (1989) :
Howard, George, "Notes and Observations on the Faith of Christ,"
_Harvard Theological Review_ 60 (1967) : 459-484.
, "The 'Faith of Christ,'" _The Expository Times_ 85 (1974)
Hultgren, A.J., "The Pistis Christou Formulation in Paul," _Novum
Testamentum_ 22 (1980) : 248-263.
Johnson, L.T., "Rom 3:21-26 and the Faith of Jesus," _The Catholic
Biblical Quarterly_ 44 (1982) : 77-90.
Ljungman, Henrik, _Pistis: A Study of its Presuppositions and its
Meaning in Pauline Use_ (Lund: C.K.W. Gleerup, 1964).
Longenecker, B.W., "Pistis in Romans 3:25: The Neglected Evidence for
the 'Faithfulness of Christ,'" _New Testament Studies_ 39 (1993) :
O'Rourke, J.J., "Pistis in Romans," _Catholic Biblical Quarterly_ 35
(1973) : 188-194.
Robinson, D.W.B., "Faith of Jesus Christ," _Reformed Theological Review_
29 (1970) : 71-81
Taylor, G.M., "The Function of Pistis in Galatians," _The Journal of
Biblical Literature_ 85 (1966) : 58-76.
Williams, S.K., "Again Pistis Christou," _The Catholic Biblical
Quarterly_ 49 (1987) : 431- 447.