Isaiah 7:9 - Exposition

If ye will not believe , etc. Translate, If ye will not hold this faith fast , surely ye will not stand fast . Full faith in the promise of Isaiah 7:7 would have enabled Ahaz to dispense with all plans of earthly policy, and to "stand fast in the Lord," without calling in the aid of any "arm of flesh." Distrust of the promise would lead him to take steps which would not tend to "establish" him, but would make his position more insecure (see 2 Kings 16:7-18 ; 2 Chronicles 28:16 , 2 Chronicles 28:20 ).