Have you ever talked with anyone who has hardened their heart towards God? Maybe you've shared miracles or blessings that have happened to you personally, and they're still not convinced of His goodness. Pastor David is teaching us today about those people who harden their hearts towards the Lord during the tribulation. They're so blind that even these super natural events that take place won't change their minds! They will blaspheme the only One who can save them in all they'll go through.