When life is conceived as a pilgrimage to the city whose maker and builder is God, and the heroes of the faith are people like Abraham, who went out not knowing where he was going, who refused to find a permanent home amid the things that are seen and temporal, who was prepared to sacrifice his son in whom all the paternal hopes and religious aspirations were concentrated, that he might receive him back by a better resurrection, then virtue can be no static excellence, but only a courageous pressing forward to the goal of faith; and the one great sin is to shrink back into destruction (New Testament Theology, 96).
Before Caird passed away he was working on the ICC commentary on Hebrews. From what I am reading in his NTT, that commentary would have most definitely been one of the best.
