I saw the devil.
It's a great illusion one never knows.
It was me.
And your screams are just a whisper.
I saw the devil in me.
Now, at last, the masks had fallen away. The strings of the puppets had become visible, and the hands of the prime mover exposed. Most ironic of all was the last gift that Raziel had given me, more powerful than the sword that now held his soul, more acute even than the vision his sacrifice had accorded me - the first bitter taste of that terrible illusion: Hope.
Kain, Legacy of Kain: Defiance
This entire town and the people in it are not the delusions of one person's mind. I am not from his mind, you are not from his mind because he never knew us. I am not the illusion from another illusion's delusion either. You could kill him and we would all still be here. Doubt your eyes all you want but the instant you start lying to yourself because you ignore your instincts you'll cause more problems and I'll have to get rid of you.
Unknown, Silent Hill: Dead & Aware
None are more hopelessly enslaved than those who falsely believe they are free.
Johann Wolfgang von Goethe
rainbows are visions, but only illusions, and rainbows have nothing to hide