The loneliest ones

One against the world,
that has to be tough.
At those who trust
you can only laugh.
Fool me once, fool me twice,
both are on me only,
better be strong,
better to be lonely.
Hide it, hide who you are,
that was the first lesson.
They will tear it apart,
continued the professor.
You can not speak the truth,
they will bring you down.
Of suffering the wisdom
is a twisted crown.
Is there any poison? Are they watching?
all the time, you fear.
There is but one thing to do, you know-
you can not let them near.