The first man in space saw the planet from a perspective distinct from the rest of us.
His position enabled that vision
We can not observe a system from within the system
Seeing the simulator and the simulation facilitates the shift in position – exit the simulation if one chooses to
Q1 is the simulator and Q3 the simulation. Q2 explains why we remain within the simulation and Q4 how to exit the simulation to a world of higher possibilities
First Discipline 
I agree with it absolutely. We can judge/undrestand a person only if we stand in his/her shoes. The perspective of one is not same as any others. it will be indeed distinct from the rest of the world.
His position enabled that vision- for such vision critical mind and analytical thinking is essential.
We can not observe a system from within the system- – often we think great of ourselves which may not be the same for others in their perspective.