Goes beyond simply believing in something you can't see.
What does the Scripture say? "Abraham believed God, and it was credited to him as righteousness." - Romans 4:3 NIV
Abraham didn't focus on his own impotence and say, "It's hopeless. This hundred-year-old body could never father a child." Nor did he survey Sarah's decades of infertility and give up. He didn't tiptoe around God's promise asking cautiously skeptical questions. He plunged into the promise and came up strong, ready for God, sure that God would make good on what he had said. That's why it is said, "Abraham was declared fit before God by trusting God to set him right." But it's not just Abraham; it's also us! The same thing gets said about us when we embrace and believe the One who brought Jesus to life when the conditions were equally hopeless. The sacrificed Jesus made us fit for God, set us right with God. - Romans 4:19-25 Message
And the scripture was fulfilled that says, "Abraham believed God, and it was credited to him as righteousness," and he was called God's friend. - James 2:23 NIV
Then he believed in the LORD; and He reckoned it to him as righteousness. -Gen. 15:6 NASB
I like the Message, it explains stuff well. so not only did Abraham believe that God would give him a child (sarah didnt but thats a whole different issue with what happened there...) he also believed God's promises, no matter what. he was old as all get out and sarah was way beyond child bearing capabilities. then after she does have the child, God asks Abraham to sacrifice him. without skipping a beat or doubting God for a second, Abraham agrees and automatically assumes that God already has a plan to fulfill His promise, wether its by raising Isaac from the the dead or by some other means, and in response to Isaac's question about what they are going to sacrifice, Abraham replies, "God will provide". doesnt that blow your mind? do you have that kind of blind trust in God, trust that no matter what He asks of you, no matter how bizare it seems to you, that it is for your own good and the He has your best interest in mind? do you trust Him to fulfill His promises? Do I? If faith the size of a mustard seed could move a mountain, what could faith like Abrahams do?
