What does Judges 13:13 mean?

Manoah's wife has received a visit from a man who looks like an awe-inspiring angel (Judges 13:2–12). Neither yet understand that this "angel of the LORD," is almost certainly God Himself in a temporary human form. Manoah has prayed for a return visit to learn more about their future son, and how they should raise the boy.

Now face to face with the "man," Manoah has posed a broad question. He apparently hopes this will draw out the most information possible. He has asked what the boy's life will be like, and what will be the focus of his life. This fits with his earlier prayer that this "angel" would teach them what to do with the promised child.

The "angel of the LORD" does not seem inclined to give Manoah added information, at least not yet. Instead, he tells Manoah that his wife should be diligent about following the instructions already given. This emphasizes that this message is primarily being delivered to Manoah's wife, and she is the one primarily responsible for keeping it, for now. However, the Lord will graciously give Manoah another overview (Judges 13:14).