Jacob was left alone, and a man wrestled with him until the break of dawn… Jacob asked and said, “Tell your name, pray.” And he said, “Why should you ask my name?” The man who wrestled Jacob never reveals his name – who was he? Malbim explains that he was Jacob’s inner demons and points of weakness. And since these inner demons constantly change, they don’t have a set name. One day they present themselves to us in one guise and the next day in a different guise.