[Faith] is trust in God's character and obedience to His living voice expressed in His Word. Consequently the object of faith in the Old Testament is the promise of God which awaits its fulfillment in the coming of Christ. Faith looked forward then, just as now it looks backward to its object in Christ. It is interesting to notice how this is expressed in the teaching of Hebrews that “faith is being sure of what we hope for and certain of what we do not see (Heb. 11:1).” In fact this perspective runs through the whole of Hebrews 11-Noah...Abel...Enoch...and Abraham “did not receive the things promised; they only saw them and welcomed them from a distance (vs. 13).” Even the martyrs who were commended for their faith did not receive what had been promised (vs. 39). Faith for them was hearing the testimony of God, trusting His promise, and living in the light of God's faithfulness to it.
Sinclair Ferguson