Matthew 2:12-15

Why does God tell Joseph to take his family to Egypt? I mean, for them to escape Herod, God cd have just hidden them locally or something. But the prophesy had to be fulfilled that “He called His son out of Egypt.”

So was sending them to Egypt just to fulfill the prophesy? But that makes it sound like they are serving the prophesy. Or is it that the prophesy is in place so that when it is done (w/ good reason) by them, it is a sign that He is the Messiah???