Have you ever felt that nudge in your heart? The nudge God gives you when He wants you to do something, in the New Testament that nudge is described as the Holy Spirit. The Holy Spirit is God inside you, telling you what to do. When Jesus left, he gave us the Holy Spirit so we can have him inside us as a comforter. In the Old Testament though, no one had the Holy Spirit because God told people what to do directly or via angel. Jesus wasn't in the picture yet so no Holy Spirit was needed.
We always need faith to do what God tells us to do, faith that God will help us through it. If you look at Abraham's life in Genesis you will find that he had A LOT of faith. God promised He would give Abraham and Sarah (who is Abraham's wife) a child. Sarah was old and barren and no child had come. He still had faith and eventually God gave Abraham and Sarah had a son named Isaac.
It doesn't stop there. Years later, God told Abraham to sacrifice his own son. I like the way God put it:
"Take your son, your only son, Isaac, whom you love, and go to the region of Moriah. Sacrifice him there as a burnt offering on one of the mountains I will tell you about." (Genesis 22:2, NIV)
God didn't just say " Sacrifice your son on mountain Moriah", He told Abraham to sacrifice his only son whom he loves very much. God puts as much pressure behind the command as possible. Abraham had waited to have his son Isaac for a long time, his only son, and God just told him to go up to a mountain and burn his kid. I should also point out that God didn't even tell him exactly where on the mountain Moriah to make the sacrifice at, God just tells Abraham to sacrifice his son on a mountain He will tell him about.
So Abraham is about to burn his only kid somewhere on a mountain. God doesn't play around. Most of us (especially me) would make up some excuse like "Can't someone else be the sacrifice?" or, "You don't want my kid, he's annoying!" Abraham didn't make excuses though, instead he set out early the next morning with his family. He didn't wait a couple days to think it over and I'm sure he didn't sleep much that night, he went out the next morning because he had faith.
After a couple days of travel Abraham looked up and saw the place God wanted him to go, so he told his family to stay put while he and Isaac climb the mountain to make the sacrifice. While climbing the mountain Abraham carried the fire and and a knife so he let Isaac carry the firewood. This is a conversation they had on their way to make the sacrifice.
Isaac spoke up and said to his father Abraham, "Father?"
"Yes, my son?" Abraham replied.
"The fire and wood are here," Isaac said,"but where is the lamb for the burnt offering?"
Abraham answered, "God himself will provide the lamb for the burnt offering, my son." (Genesis 22:7,8, NIV)
So we can see that Isaac doesn't know yet that he is the sacrifice, and Abraham doesn't tell him. Instead, Abraham tells Isaac that God will provide the burnt offering. Abraham has no idea why God is asking him to reduce his kid to a crisp, or why, he just knows that God wants him to do it. He has faith in God, he knows how infinitely big God is. Abraham knew that whatever reason God asked him to sacrifice Isaac was a good reason. He knew that God gave him Isaac and that He can take Isaac back if He wants to. Abraham didn't ask God's motives, instead, Abraham did what God told him to do without question. He knew that God would provide enough information to perform the sacrifice. If why the sacrifice had to be made wasn't need to know, then Abraham didn't need to know.
When they finally get to their destination, Abraham builds an alter. He puts the wood on the alter, ties up his son, and lays him on top of the wood. Isaac must have trusted his dad a lot because the Bible doesn't say anything about him struggling or fighting back. Even Isaac must have known God had a plan, it takes a lot of faith to let someone tie you up and put you onto an alter. Abraham was just about to bring his knife down on Isaac when an angel from Heaven yelled:
"Abraham! Abraham!"
"Here I am," Abraham replied.
"Do not lay a hand on the boy," he said. "Do not do anything to him. Now I know that you fear God, because you have not withheld from me your son." (Genesis 22:11, 12, NIV)
In the next verse it says that Abraham looked up and saw a ram caught by his horns in a tree. So he got the ram out of the tree and sacrificed it. I imagine that by now Isaac has a mess to clean up in his biblical pants, after all, this was his first near-sacrifice experience.
Abraham's faith payed off, he didn't have to burn his kid to a crisp after all. God just did that to see if Abraham would actually make the effort to sacrifice his son, God just wanted to see if Abraham trusted Him. I have been talking a lot about faith but I would also like to point out how humble Abraham was. Abraham had almost no pride, if he was prideful he wouldn't have even made the trip to sacrifice his son, he would have probably mouthed off at God like Cain did. The more pride we have the less room in our lives there is for God, but if we are humble like Abraham then we will do what God tells us to do without hesitation and we will trust in Him. Humble doesn't mean always putting yourself down and saying you are nothing, it means not thinking about yourself at all. A humble person doesn't even think about being humble. C.S. Lewis said that a truly humble person would be a "cheerful, intelligent chap", and that we would probably be "envious of anyone who seems to enjoy life so easily".
In the beginning of this post I told you that now God doesn't speak to us directly anymore, He doesn't send angels down to tell me "Hey Caleb, witness to that dude over there!", He uses the Holy Spirit. I will tie that in with the story of Abraham and Isaac by saying that, no matter how God speaks to you or tells you what to do, you should have faith and follow God's command through. We can never take lightly what God says in our hearts, our God is a loving God, but that doesn't mean He doesn't have wrath. If we disobey our Heavenly Father there will be consequences just as I showed you with the story of Cain and Abel. The more humble we become, the more we will listen to God to make sure we follow His every word, and the more faith we will have because of it.