4628. With regard further to the odors into which the spheres of perceptions are turned, they are smelt as plainly as are odors on earth, but do not reach the sense of the man whose interiors are closed; for they flow in by an internal, and not by an external, way. These odors are from a twofold origin-the perception of good and the perception of evil; those from the perception of good are as intensely sweet as though they exhaled from the fragrant flowers of a garden and other fragrant things, and are inexpressibly pleasant and various, and the angels of heaven are in the spheres of such odors; whereas the odors which are from the perception of evil are as intensely repulsive as are the stenches and putrid smells from stinking waters, excrements, and carcasses, or the filthy smell from mice and bedbugs. In the spheres of such stenches are they who are in hell, and wonderful to say they who are in them do not perceive their offensiveness, nay the stenches are delightful to them, and when they are in them, they are in the sphere of their delights. But when hell is opened, and the exhalation from it reaches good spirits, these are seized with horror and distress, like those in the world who encounter the sphere of such stenches.