"There are many types and degrees of density among astral matter, for example, so that it is possible for one man to have an astral body built of coarse and gross particles, while another may have one which is much more delicate and refined. As the astral body is the vehicle of the emotions, passions and sensations, it follows that the man whose astral body is of the grosser type will be chiefly amenable to the grosser varieties of passion and emotion; whereas the man who has a finer astral body will find that its particles most readily vibrate in response to higher and more refined emotions and aspirations."