What does the judge know that Octavie does not? How do you know ?

The Judge knows that Octavie's life isn't over he knows she has a future in front of her he knows that Edmond is still alive.

As they neared the house the old gentleman placed an arm around the girl's shoulders and turning her face up to him he said: "Do you not think that on a day like this, miracles might happen? When the whole earth is vibrant with life, does it not seem to you, Octavie, that heaven might for once relent and give us back our dead?"

no it who u choose to be. let no one tel u what or who to be;