17. They are averse to vocal speech, because it is material; wherefore when I conversed with them without intermediate spirits, I could only do it by a species of active thought. Their memory, as consisting of things not of images purely material, supplies objects that are nearer to the thought; for the thought, which is above the imagination, requires for its objects things abstracted from material. But notwithstanding this, the spirits of Mercury are little distinguished for their judgment, having no delight in the exercise of that faculty, and the deducing of conclusions from knowledges; for bare knowledges alone are delightful to them.