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2 Kings 6:14-17 is an example of where God provided special vision for humans to perceive angels. It was the story of the king of Aram who sought to capture the prophet Elisha. Observing king Aram’s forces surrounding their home, Elisha’s servant fears for his master’s safety. To reassure his servant and revealing his own special vision of angels, Elisha prays to God and requests that his servant can see the angels protecting them.

Without God's help, Elisha's servant would not have seen any angel regardless of how hard he tried.