“Every man takes the limits of his own field of vision for the limits of the world. This is an error of the intellect as inevitable as that error of the eye which lets us fancy that on the horizon heaven and earth meet. This explains many things, and among them the fact that everyone measures us with his own standard—generally about as long as a tailor's tape, and we have to put up with it: as also that no one will allow us to be taller than himself—a supposition which is once for all taken for granted.”