First Lesson
This is a Necker Cube.
This is the other Black Box.
As you stare at it, you will find that it will flip and turn. First you will see it from one direction, and then from another.
You must fix it in place. If you can stare at the cube in the same configuration for 20 to 30 seconds, then you have passed the first lesson.
You have altered your physical perception purely by force of will.
You have performed magick.
Admittedly, you have performed the smallest piece of magick it is possible to perform, but that is why this is the first lesson. You must learn to experience the thing before you can learn more about it.
Further Lessons
Each person's magickal experiences are different. Lessons will be tailored to you. Your beliefs will be challenged, then integrated. You will see the world outside the black box. You will see the world inside the black box.