That is correct. The more powerful the illusion, the more I am feeding. At their strongest, the illusions can become such that you would be unaware an illusion is occurring at all.

[She stretches an arm out the window towards the garden.] However, even a powerful illusion has an escape. One only need to fight against what they see for the illusion to break. In this case, it would be to run outside the bounds of the illusion itself.

Although I do not wish to imply you have reason to distrust me, I always feel it necessary to explain the weakness of my illusions, just in case the need ever arise in which you would must break from one yourself.