In the Emerald Tablets of Thoth, precisely Tablet VIII, The Key of Mystery it is explained from where this unknown and terrible fear comes to your mind. Read carefully.
More details explanation of the origin of all fears gave us Carlos Castaneda in his last book Active Side of Infinity.
We have a predator that came from the depths of the cosmos and took over
the rule of our lives. Human beings are its prisoners. The Predator is our
lord and master. It has rendered us docile, helpless. If we want to protest,
it suppresses our protest. If we want to act independently, it demands that
we don't do so... I have been beating around the bush all this time,
insinuating to you that something is holding us prisoner. Indeed we are held
prisoner!
This was an energetic fact for the sorcerers of ancient Mexico ... They
took us over because we are food for them, and they squeeze us mercilessly
because we are their sustenance. Just as we rear chickens in chicken coops,
the predators rear us in human coops, humaneros. Therefore, their food is
always available to them.
No, no, no, no, Carlos replies. This is absurd don Juan. What you're saying
is something monstrous. It simply can't be true, for sorcerers or for
average men, or for anyone.
Why not? don Juan asked calmly. Why not? Because it infuriates you? ... You
haven't heard all the claims yet. I want to appeal to your analytical mind.
Think for a moment, and tell me how you would explain the contradictions
between the intelligence of man the engineer and the stupidity of his
systems of beliefs, or the stupidity of his contradictory behavior.
Sorcerers believe that the predators have given us our systems of belief,
our ideas of good and evil, our social mores. They are the ones who set up
our hopes and expectations and dreams of success or failure. They have given
us covetousness, greed, and cowardice. It is the predators who make us
complacent, routinary, and egomaniacal.
But how can they do this, don Juan? Carlos asked, somehow angered further
by what don Juan was saying. Do they whisper all that in our ears while we
are asleep?
No, they don't do it that way. That's idiotic! don Juan said, smiling. They
are infinitely more efficient and organized than that. In order to keep us
obedient and meek and weak, the predators engaged themselves in a stupendous
manoeuvre stupendous, of course, from the point of view of a fighting
strategist.
A horrendous manoeuvre from the point of view of those who suffer it. They
gave us their mind! Do you hear me? The predators give us their mind, which
becomes our mind.
The predators' mind is baroque, contradictory, morose, filled with the fear
of being discovered any minute now.
I know that even though you have never suffered hunger... you have food
anxiety, which is none other than the anxiety of the predator who fears that
any moment now its manoeuvre is going to be uncovered and food is going to
be denied.
Through the mind, which, after all, is their mind, the predators inject
into the lives of human beings whatever is convenient for them. And they
ensure, in this manner, a degree of security to act as a buffer against
their fear.
The sorcerers of ancient Mexico were quite ill at ease with the idea of
when the predator made its appearance on Earth. They reasoned that man must
have been a complete being at one point, with stupendous insights, feats of
awareness that are mythological legends nowadays.
And then, everything seems to disappear, and we have now a sedated man.
What I'm saying is that what we have against us is not a simple predator. It
is very smart, and organized. It follows a methodical system to render us
useless.
Man, the magical being that he is destined to be, is no longer magical.
He's an average piece of meat. There are no more dreams for man but the
dreams of an animal who is being raised to become a piece of meat: trite,
conventional, imbecilic.