He must catch hold of his surroundings while he moves, he must also move all those round him.

Everyone cannot be a magnet; we are not all made of the same stuff.

But one can make a cogged wheel out of whatever one will--and beside, a magnet only influences certain substances.

It will draw iron, but cannot attract copper, wood, or stone; but the cogwheel takes hold of anything near it, of whatever material it is made.

I will not work the illustration to death.