It happened, when the Philistine arose, and came and drew near to meet David, that David hurried, and ran toward the army to meet the Philistine.
How did that stone strike Goliath in the forehead while the giant had on his helmet?  "The giant's helmet had no visor, that protection not having as yet been invented."[19]  However, even if his helmet had been equipped with a visor, Goliath would have felt no need whatever to close it.  In any event, his forehead was exposed.