Agrippa

Cornelius Agrippa and the Magicians, Mystics, and Philosophers of Trimegistos refer to their goal as the Great Secret. However, it is merely the hardest thing in the World for each individual, and the secret is not hidden, but is merely impossible to think of... other than as a far away dream... something forever receding from our grasp.

There are no secrets. There are merely achievements seemingly impossible, the pursuit of which are the basis for our sense of Fear.