Do you understand the message from the computer? I don't understand all of it. I know when they say the door is tied to two keys it's the keys of light and darkness and how it says none shall pass but shadows, it means that only dark beings may pass through the door, but what about the rest?
"Ones born of the heart and darkness, devoid of hearts, ravage all worlds and bring desolation." - Go Heartless. Destroy everything.
"Seize all hearts and consummate the great heart." - Heartless, go take all of the hearts you can and create Kingdom Hearts for me [Ansem: SoD].
"All hearts to be one, one heart to encompass all." - All hearts will go to Kingdom Hearts.
"Realize the destiny: the realm of Kingdom Hearts. The great darkness sealed within the great heart." - Kingdom Hearts is Darkness and that is the the fate of all things.
"Progeny of darkness, come back to the eternal darkness." - All things born of Darkness, return to Darkness.
"For the heart of light shall unseal the path." - The Princesses of Heart shall guide the way to the Door to Darkness.
"Seven hearts, one Keyhole, one key to the door." - Seven Princesses of Hearts, one Keyhole to the Darkness (in Hollow Bastion), and the Keyblade of hearts to unlock the Door to Darkness.
"The door of darkness, tied by two keys." - The Door to Darkness is locked and unlocked through two Keyblades. (i.e. we know that one Key from the Realm of Light and one Key from the Realm of Darkness are needed to lock the Door to Darkness from each side of the door.)
"The door to darkness to seal the light." - Once the door of Darkness is open, Light will expire...or whatever.
"None shall pass but shadows, returning to the darkness." - When the Door to Darkness opens, Darkness will flood the universe and all beings with hearts will turn into Heartless and will return to Darkness.
"One born of the heart and darkness, hunger for every heart until the dark door opens." - Heartless hunger for hearts until the Door of Darkness is opened and all hearts return to Darkness.