194. For the same reason, again, any one in the spiritual world who intensely desires the presence of another comes into his presence, for he thereby sees him in thought, and puts himself in his state; and conversely, one is separated from another so far as he is averse to him. And since all aversion comes from contrariety of affection and from disagreement of thought, whenever in that world several are together in one place they are visible [to one another] so long as they agree, but vanish as soon as they disagree.
