What does Ophelia mean in her statement to Claudius?

In act four, scene five, Ophelia is speaking to King Claudius when she utters the phrase "Lord, we know what we are, but know not what we may be." (43). She has been tormented by the fact that her father Polonius is now dead. She knows that Hamlet does not love her and she is wondering about what her future beholds. With everything lost, her madness mirrors Hamlet's own state of being. Throughout act four, scene five, she sings her dialogue in discussion with Queen Gertrude and the King.

In her maddened state she tells the queen singing: "He is dead and gone, lady, He is dead and gone; At his head a grass- green turf, At his heels a stone." Her fathers sad passing has prompted her crazed state. She knows not what the future beholds for her or the kingdom. She is posing an interesting question inadvertantly through a statement. She really wants to know the meaning of what has all happened and where they are all going to go from there. She is not accepting her fathers death, but she is reliving the sadness over again in her mind. She wonders how things can continue to remain in any state of normalcy. Even though they know what they are like at this point in time, she distinctly points out that the future is unknowable and they could become so much different depending on the choices they presently make.