How else did he try and mold your methods of thinking, 
the way you looked at the world?
Well, we had a lot of little games. 
Like he would say at the dinner table...  he would think up some little problem, and he would say,
 "Suppose we were
-- you were a Martian, and we came down to this Earth,
and we'd look at it from the outside." 
And I, I can't explain exactly what he meant,
but there is a way of looking something anew, as if you never saw it before,
for the first time, and asking questions
about it as if you were different.
It started with a question of his kind:
Suppose you were a Martian who never slept.
(They didn't have sleep/didn't have to sleep.) 
And you come down to this Earth and you saw these people who have this funny property that 
every day for a certain amount of time they have to lie down and become unconscious.
And then the natural question would be: How does it feel to get unconscious? What happens? 
Do your ideas run along and
suddenly they stop?
Or do they just run more and more slowly? 
What happens to your ideas? How does it feel to become unconcious?
So I tried to answer the question: 
What happens when you become unconscious?
But you find that these days you still -- when you're faced with a particularly difficult problem,
when you're absolutely stuck -- you tend to say, 
"Let's look at it like a Martian would look at it?"
Sometimes... There are a lot of things that people did.
For example...
Maxwell put the equations together...
the Faraday he formulated the equations mathematically with some model in his head.
And then Dirac got his answer by just writing and guessing an equation
and uh...
Other people got their answers, like in relativity,
they got their idea by looking at principles of symmetry.
Now all these methods...
And Heisenberg got his Quantum Mechanics
by thinking only talk about the things
that you could measure. 
Now all these ideas:
That we should only talk about the things that we can measure
Try to define things only in terms of what
we can measure. 
Or let's formulate the equation mathematically,
 or let's guess the equation or
– all these things 
are tried all the time. (Look for symmetries.)
All that stuff is tried– all that stuff...
when we are going against
the problem, we do all that. 
Thats very useful, but we all know that.
That's what we learn in physics classes – how to do that.
But the new problem, where we're stuck,
we're stuck because all those methods don't work.
If any of those methods would've worked,
we would have gone through there.
So when we get stuck in a certain place,
it is a place where history will not repeat herself.
And thats more -- makes it even more exciting. Because whatever we're going to look at
at the other– the method, and the trick, and the way it's going to look – 
Is going to be very different than anything that we've seen before,
because we've used all the methods from before.
It... I don't care. The only thing that...
The real test in physics
is experiment, and history is
 fundamentally irrelevant.
