There is no turning back from this path now, Little Prey. Once you have began your descent into the Darkess, there will be no Light to guide you back. You can't enter The Ruins, anyway. Not without the help of one who serves the Master.
The unfaithful Hellhound falls from my gaze. Did perhaps the Master claim him, or does he hide? Only time can tell. Give it up, already, Cerberus. You won't reach Boston.