Make Your Decision is a written note in Dishonored 2.
I've made my arrangements for the séance. Delilah's effigy is in place, attuned to your wretched burrow of a house. I set alight candles made from materials I dare not name, and a special incense that took nearly a year to find. Open the door as little as possible until tonight.
I'll return with Luca, Kirin, and Grim Alex just before the appointed time. And I don't want to hear any more about your silly doubts. It's an honor that we're doing you, allowing you to participate in Delilah's return. We'll start whether you're there or not. Time to decide which future you want to be a part of.
The note can be found on the floor of Stilton's gazebo, among other scattered documents, in the present, during the mission A Crack in the Slab.