Chabad-Chassidic teaching discusses
two levels of knowledge: "positive knowledge" and "negative knowledge".
Positive knowledge is when you understand something; negative knowledge
is when there is something beyond your comprehension and you understand
what it is that you do not understand. Negative knowledge is higher
than positive knowledge, since the most difficult thing for the human
mind to comprehend are its own limits. But higher yet, say
the Chassidic masters, is a third level: understanding that there are truths
that are beyond the domain of "negative knowledge" as well;
comprehending that you cannot even comprehend what it is that you do not
comprehend. Chassidim would illustrate with the following parable:
The story is told of a group of coachmen in a small town in the backwoods of
Russia who heard some disturbing news from the big city. Frightening things were
happening in the world: bands of iron were being laid across the plains and
forests of Russia, upon which an iron monster, who ate coal and spewed fire and
smoke, would move three times faster than the fleetest team of horses. It was
said that this demon could pull a hundred iron coaches and thousands of
passengers. No longer would anyone need to hire a coach and coachman to go from
town to town. No longer will merchants negotiate the price of a wagon to take
their wares to the market in Leipzig. People were already travelling from Moscow
to Petersburg in this manner, and soon these roads of iron will connect every
town in Russia.
"And how many horses does this machine use?" asked Misha, the
oldest and ablest of the coachmen. "None whatsoever," said Grisha, who
was the source of the news. "That's the whole point: no horses, and no
coachmen." "Impossible," said Misha with authority. "A
hundred iron coaches, no horses? Impossible!"
"But here's the letter from my cousin from Smolensk. He writes that the
iron rails have already reached the city, and that next month the first of these
machines will arrive from Moscow." After much debate, the coachmen decided
to travel to the city and see for themselves.
At the appointed time, they stood at the edge of the crowd that had gathered
on the platform at the newly erected station. They heard it before they saw it,
an unearthly sound of crashing metal and a thousand charging bulls. And then, in
a huge cloud of black smoke, it appeared: a line of iron coaches, stretching as
far as the eye could see, traveling faster than the mightiest horse, a
shrieking iron monster at their head. It pulled up alongside the cheering crowd,
let go a final ear-piercing wail, and died.
As the crowd surged towards the train, the coachmen remained rooted to the
ground, mouths agape, stunned to the very core of their souls. Misha was the
first to recover. Ignoring the train of carriages and their disembarking
passengers, he boldly approached the engine. Carefully he circled the still
shuttering monster, running his eyes over every inch of its surface. He peered
into the engineer's cabin and crouched between the wheels to examine the
undercarriage. Muttering to himself, he rejoined his fellow coachmen on the
platform.
"Amazing!" he kept saying to himself. "What a horse! What a
horse!"
"A horse?" asked his colleagues.
"Of course," said the veteran coachman. "There's got to be a
horse hidden somewhere in there. Think of it -- a horse, probably no
bigger than a kitten, who can pull one hundred iron coaches. What a horse!"