First day on the job, you know what I learned? How to spot a murderer. Let's say you arrest three guys for the same killing. You put them all in jail overnight. The next morning, whoever's sleeping is your man. You see, if you're guilty, you know you're caught, you get some rest, you let your guard down.
Now you're looking for the secret. But you won't find it because of course, you're not really looking. You don't really want to work it out. You want to be fooled.
After that my guess is that you will never hear from him again. The greatest trick the devil ever pulled was convincing the world he did not exist. And like that... he is gone.
No one cares about the man in the box, the man who disappears.
The secret impresses no one. The trick you use it for is everything.
How do you shoot the devil in the back? What if you miss?