What way is Abraham faith an example to us today?

From the Matthew Henry Commentary:

His faith was supported by the sense he had of the mighty power of God, who was able to raise the dead; he reasoned thus with himself, and so he resolved all his doubts. It does not appear that he had any expectation of being countermanded, and prevented from offering up his son; such an expectation would have spoiled the trial, and consequently the triumph, of his faith; but he knew that God was able to raise him from the dead, and he believed that God would do so, since such great things depended upon his son, which must have failed if Isaac had not a further life.

This indicates that Abraham had the type of faith that believes what God has promised us will be fulfilled even when the circumstances would seem to preclude that fulfillment. Also, we should understand that true faith never compromises our Biblical principles for any sake, even that of what we might perceive as a greater good.