The deadness of Abraham and Sarah's body was very real. It was nothing that Abraham or Sarah did/said or thought that made their reproductive systems unable to produce a child. Sarah had always been infertile (Genesis 11:30) and on top of that, now she was an elderly woman past any capability of carrying a child. If all that Abraham and Sarah had to do was believe that they could conceive a child at their age in order to conceive a child, then we are actually reducing the miracle that God performed here and bringing New Age "power of the mind" into our churches. This is terribly wrong and offensive to God! As we read in the scripture above, "he did not waver in unbelief but grew strong in faith, giving glory to God, and being fully assured that what God had promised, He was able also to perform."
Abraham's faith was correctly focused on God's ability to perform the miracle He had promised. This is where we should focus our faith as well.
If you are in a multiple year battle or in a battle where your sickness is progressively getting worse (or fatal), you have to be settled about this. Otherwise as you walk this journey with the Lord, your faith in God will get shipwrecked and you will begin to focus inward and condemn yourself for not "believing right" if things get worse. I've seen it time and time again with many friends and strangers online. They have been so confused by putting their faith in their faith, their words, their declarations and their "positive confession" that they aren't even looking to God anymore. We should simply keep our focus on Jesus and not on us.
Now unbelief occurs when a person doubts God's ability or power to heal their body. These are things we may have to face and wrestle at times in our walk with God. I think that's part of the growing process and maturing in the faith. As long as we don't call it quits and walk away from the faith, I think this is a healthy process that needs to be encouraged with care.
When Peter doubted as he walked on the water, Jesus didn't just let him drown. Jesus reached out and grabbed him during his weakest moment and brought him to safety. We can trust that God will do the same for us in our weakest moments. Sadly with the way some ministers teach doubt and unbelief, you would have thought Jesus just watched Peter drown! haha
As a church, we need to have more compassion and understanding, so we can build people up and bring their focus onto God instead of towards themselves.
True faith is not about how hard you muster up a feeling or try to believe, but instead it is about WHO you believe in.
Updated: March 2016