Where does this energy come from?

My bro brought this to my attention after he quickly
scanned the chapter excepted below. Then it hit him as
it hit me some time ago. (I've covered it once
before on my blog.)

Any kid who's played with 2 pole magnets knows this
works.

Now think further, kids...

Do we truly understand magnetism? We know that
two magnets will repel each other if both of
their north poles or south poles face each other,
but can we truly explain this? If we try to hold
these two magnets together against this repelling
force our muscles will tire as we continuously
expend energy, but the repelling force from
within the magnet does not. Is it reasonable that
an apparently endless force from within magnets
will continuously battle any external power
source in this manner, eventually exhausting all
external power sources without an equivalent
weakening itself? In fact, there is no
identifiable power source at all within these
magnets to support this endless force from
within. Do we even know what magnetic fields are,
or have we simply discovered how to create them
and learned to model their behavior with
equations? That is, are we confusing practical
know-how and abstract models with true knowledge
and understanding?

From The Final Theory.

Endless free energy?

Bank on it.

Now I don't wanna hear anyone say this is a violation
of the Law of Conservation of Energy (what energy?)
or The Impossible Perpetual Motion Machine. If you
feel like doing that read the excerpt above again
and think again.

Somebody's gonna do this...sooner or later.

The objections will be irrelevant.

Now see what appears to be a practical application.