Well, think of one part of the mind as you, and the other part of your mind as all the zombie bots in your simulation. It's like you can only plant an acorn and tend to the tree, but you cannot control how the tree grows. Basically, once you do it, you can't stop it, and you can't control what the zombies do. That is, unless you just restart the simulation because they destroyed your ecosystem and you're sad about it.