In the Dunwall Distillery mission, if you crouch in the rafters above the overseer meeting hall and wait through the entire overseer sermon rather than proceeding, you hear the Abbott deliver a speech that gradually reveals the Abbey of the Everyman’s true relationship with the Void.
The speech is not subtitled. It is not triggered by any objective. It lasts several minutes and ends with a line that directly contradicts the Abbey’s official doctrine, implying senior overseers know the Outsider is real and choose suppression over acknowledgment.
Dishonored’s world-building is almost entirely ambient. The lore lives in books, conversations you can overhear, and environmental details. The overseer sermon is the most explicit piece of hidden lore in the base game — and it is only accessible to players patient enough to hide and listen rather than act.
The Outsider himself acknowledges this duality in his observations: he finds the Abbey’s fear of him more interesting than the worship of the Empress. Both attitudes are responses to the same power, filtered through different social functions.

The level of craft hidden in the background of this game is genuinely moving. They made it for someone.
Didn’t realise how much was hidden under the surface. Makes me want to replay it with fresh eyes.