The textbooks say the electrons can't occupy the same space, so they orientate themselves where their spins don't align with each other.

Does this mean more of the electrons in a magnet are occupying the same space since their spins are aligned with each other?

It appears to me the strength of the field is directly proportional to the amount of electrons or mass occupying the same space.

If the electrons can occupy the same space in the magnet due to their spins being aligned, then the statement is false because it says the electrons can't occupy the same space.  If the electrons can't occupy the same space in a magnet, then the statement is misleading cause it suggests being able to occupy the same space if there spins are aligned, which we are taught happens in a magnet.

How could such a ridiculous statement be made in an academic book.

Some thaughts:
When electrons flow along a wire, their spin are forced to go angular to its direction of flow. This creates a magnetic field. To compare with something else: I fly RC planes. The propeller is spinning. When I fly in "knife edge" the planes wings are vertical, but the fusalage are angled a bit in flying direction, so are the propeller compared to its direction. I know the engine is working much harder to keep the spin up on the propeller as I can hear the propeller makes much more virations. My theory is that the spinning propellers edge, its speed around its axis is continously going faster and slower compared to the planes velocity because of the angle. This difference will force the propeller to go angular to its direction, in order to keep a constant speed of the propeller.

I assume there must be some mass in an electron that wants to do the same thing as it spins. Those electrons that is spinning in 0 degrees of the direction of its flow is undetermined which way it wants to flip to go angular to the flow direction. Like the rotor on a helicopter that is moving forward. But those which are in a sertain angle are somhow forced to spin angular to their direction.

To make the confusion complete, I assume the electrons in a solid matter is spinning in random directions, like if I had two propellers on my plane going in opposite directions, both propellers are forced to spin angular to the planes direction through the air. If so, two electrons are forced in angular spin, but in opposite directions, no magnetic field is created as current is flowing through the wire.

So then I assume that the polarity of the electric field is first forcing the electrons to spin in the same direction, then the current flow will force them to spin more and more angular to its direction through the wire. Then a magnetic field will occour. In a magnetic material I then assume when you disconnect the electric field, the electrons remains more or less in the same spinning angle, hence the magnetic field continues without a electric field, but there is still current flowing through the magnet.

As there is no electric field left, but the current is still present to maintain the magnetic field, no energy is present in the magnet. Only potential energy is left.

Br.

Vidar

I agree with LowQ.

Does this mean more of the electrons in a magnet are occupying the same space since their spins are aligned with each other?

From what I gather you are not adding more electrons to the magnet. There is a finite number of electrons in the magnets mass and you are just forcing them with emf to spin in the same direction. Which in turn creates the back flow or opposite direction of spin to create an opposite pole. The electrons themselves are just lined up in strings side by side across the mass. Only so many can be side by side before the next electron is displaced to creating another string across the mass. 

It appears to me the strength of the field is directly proportional to the amount of electrons or mass occupying the same space.

I think inertia comes into play also. If you are referring to the magnets volume of electrons occupying the same space within the confines of the magnet dimensions,that has nothing to do with 2 electrons in the same place. If you force two electrons into the same space it becomes one electron with a higher negative charge or something completely different. Thats what I get out of it.