he understood how people on the antipodal side of the earth can walk, when, from our point of view, their heads point down. (For when this is portrayed in a spiritual manner, and a person is placed in the opposite region of the globe, spirits almost detest it, and suddenly vanish, because they do not understand it, as has sometimes happened.) Then he denied any such thing, but when I convinced him that nothing is truer, as all experience testifies and proves, then this is what he had to admit: that he did not understand it, even though it is true, and he therefore ought by all means to believe it.