Heb. 11:17-18 It was by faith that Abraham offered Isaac as a sacrifice when God was testing him. Abraham, who had received God's promises, was ready to sacrifice his only son, Isaac, although God had promised him, "Isaac is the son through whom your descendants will be counted."
The faith that Abraham lived was one of absolute commitment, trust, and confidence in God. God promised Abraham that Isaac was going to be the one that God was going to use to keep His promise to him of a nation of people too numerous to count who would possess the land of Israel. Abraham believed God explicitly. He knew it was going to happen. He knew Isaac was going to be the beginning of the fulfillment of God's promise.
Yet, God tested Abraham's belief. He demanded that he take Isaac up to Mt. Moriah and offer him up there as a sacrifice before God. Abraham had no clue as to what God was up to. From all outward appearances it would seem like God had changed His mind and had other plans to fulfill His promise. Yet, Abraham knew in his heart that God would keep His word. He absolutely trusted God's character and knew He would fulfill His promise through Isaac. Abraham did not know how God would do it, all he knew was that He would. Abraham was willing to obey God explicitly. Not only would Isaac die, but as far as he knew, so would the fulfillment of God's promise. Abraham did not waver in his knowledge of God's trustworthiness and faithfulness. God would keep His word.
What an awesome challenge for our faith today! Do we know God well enough to trust Him no matter what appears to be going on around us? Do we have an absolute confidence in God's character that enables us to live without doubting His promises to us? Are we absolutely committed to God?
When we fail to believe and trust in God absolutely, we are in essence casting doubt on who He is. True faith is that which is grounded in the perfect holiness of God's character. It is knowing that God is absolute Truth and He will always be true in all He says. The test of your faith is how you live out what you know to be true. Does your living back up what your belief in God? Do you have an unshakeable trust in God?