"Early the next morning Abraham got up and loaded his donkey. He took with him two of his servants and his son Isaac. When he had cut enough wood for the burnt offering, he set out for the place God had told him about." NIV translation
Even though he might not have understood the purpose behind God's instructions, he promptly obeyed. He did not hesitate or come up with religious sounding excuses such as "I'll pray about it" but instead headed for Jerusalem. In Abraham's example, we are reminded that excuses (even religious sounding ones) are, in fact, disobedience.
"On the third day Abraham looked up and saw the place in the distance. He said to his servants, 'Stay here with the donkey while I and the boy go over there. We will worship and then we will come back to you.'" NIV translation
Was Abraham being deceptive in what he told his servants? Probably not; this is a demonstration of his faith. He told them that they would both return and yet he was prepared to offer Isaac as a burnt offering. He just believed that God could raise him from the dead and stood on His promises.
We see that they arrived after three days on the road and are reminded of Jesus' three days in the tomb. Can you imagine those three days of travel for Abraham? That walk of faith had a purpose that he probably did not even see which was to build us up in our faith. As Christians, we are all on our own journey and, just like Abraham, our journey can build others up in their faith. The story of Abraham's walk is described here but you can share your own through this online ministry.
"Abraham took the wood for the burnt offering and placed it on his son Isaac, and he himself carried the fire and the knife. As the two of them went on together, Isaac spoke up and said to his father Abraham, 'Father?' 'Yes, my son?' Abraham replied. 'The fire and the wood are here,' Isaac said, 'but where is the lamb for the burnt offering?'" NIV translation
Isaac carried the wood for the fire just as Jesus carried the cross. Isaac had spent years watching his father make offering to the Lord and so he noticed that this was different. You can almost feel the sorrow as Isaac asked about the lamb. We are reminded that Abraham had no idea how God was going to give him back his son.