I was quite pleasantly surprised to find this in none other than James Dunn’s commentary on Romans. Given the recent discussions on faith versus faithfulness, I thought people might enjoy mulling over this quotation. Dunn is commenting on Romans 4:21 (which describes Abraham’s confidence that God fulfills His promises):
It was confidence in God, a positive acknowledgment of God’s power as creator, a calm certainty that God had made known to Abraham his purpose and could be relied on to perform it without further question or condition. Here from another aspect is the same reason why Abraham’s faith should not be though of in terms of covenant loyalty or as incomplete apart from works, for faith is confidence in God’s loyalty as alone necessary, as alone able, as alone sufficient to bring God’s promise to full effect (p. 239 of volume 1).
It should be noted here that in the context of Romans, Paul goes on immediately to apply Abraham’s faith as a template or example for us (see 4:23). I should note that this quotation does not alleviate the other problems in Dunn’s theology. However, on this point, Dunn seems to agree with the critics of the FV.