Though he had failed to wait on God's promise of an heir and had taken one of his kindred, Lot, with him when he set out to follow God's leadership, by the time Isaac was born, Abraham had learned to listen to God.  He had become an obedient follower.  God instructed Abraham to go to the land of Moriah and sacrifice Isaac on a mountain that God would show him.  This was the son that he had waited a hundred years for.  This was the son that he had doubted God could deliver.  Still, Abraham got up the next morning and assembled the supplies necessary for the sacrifice and with Isaac and two of His young men set out for Moriah.  As a follower of Christ, what do we have that we would refuse to give totally to God if we knew He was asking us to sacrifice it?  Abraham had a three day journey to reach his destination of which he was still not sure of the exact location, just a mountain that God would show him.  We can only imagine the thoughts that Abraham had during that time.  We can look back and say that he knew God would not really demand that he sacrifice Isaac, but that really wasn't the case.  Then, when Isaac and he were on the way up the mountain with the wood and Isaac asked where was the sacrifice, Abraham didn't say that he would figure it out.  He said, "My son, God will provide for Himself a lamb for a brunt offering."  Then, when they reached the point for the sacrifice, Abraham bound Isaac and laid him on the wood, ready to sacrifice him.  He had three days to come up with his own plan, but he followed what God had instructed him to do.  How often do we decide to do somewhat as God has instructed us to do instead of totally following His instructions?  God did indeed provide a lamb for Abraham that day, but as Stephen would remind the council, He also provided a Lamb for all people for all time, His Only Son, Jesus Christ.  Some people ask how God could ask such a thing of Abraham, yet it was no more than God asked of Himself.  He gave that which He loved, His Son, to redeem us.  Abraham and Isaac received a blessing that day because Abraham was obedient to God.  How often do we miss a blessing because we are not totally following God's directions?