You've been there many times, standing in the valley of decision. Perched precariously between victory and defeat. On one side of you is the word of the world authored by Satan that says, for example, "You're not going to get healed." On the other side of you, the Word of God is saying, "My Word is Yea and Amen" and "By His stripes, ye were healed." Who will determine how it all turns out? You will. You're the establishing witness.
I remember a fellow once who wanted me to pray for him. I said, "Now the Word says you're healed." He interrupted me and said, "Yeah, I know it says that, but I've got this terrible pain here...."
I looked him in the eye and said again, "The Word says, 'By His stripes, you were healed.'"