Isaiah 7

The last three verses of Isaiah 7 repeat a theme involving "thorns and briers." In verse 23 they will overrun the valuable vineyard rendering it worthless. In verse 24 their presence will return the land to an uncontrolled wilderness; a hunting ground rather than a cultivated ground. Finally verse 25 describes it as a fearful place because of the "thorns and briers. In the end the land that once produced an abundance of grapes is now only the source of grazing land for livestock. It would be hard not to associate the "thorns and briers" with the curse of sin. So the vineyard is introduced as a picture of the people of faith. The prevalence of sin among God's people will fall into a fearful worthless wilderness.
Stuart