3884. As in the world it is quite unknown that there is a correspondence of heaven or the Grand Man with all things of man, and that man comes forth and subsists therefrom, so that what is said on the subject may seem paradoxical and incredible, I may here relate the things that experience has enabled me to know with certainty. Once, when the interior heaven was opened to me, and I was conversing with the angels there, I was permitted to observe the following phenomena. Be it known that although I was in heaven, I was nevertheless not out of myself, but in the body, for heaven is within man, wherever he may be, so that when it pleases the Lord, a man may be in heaven and yet not be withdrawn from the body. In this way it was given me to perceive the general workings of heaven as plainly as an object is perceived by any of the senses. Four workings or operations were then perceived by me. The first was into the brain at the left temple, and was a general operation as regards the organs of reason; for the left side of the brain corresponds to rational or intellectual things, but the right to the affections or things of the will. [2] The second general operation that I perceived was into the respiration of the lungs, and it led my respiration gently, but from within, so that I had no need to draw breath or respire by any exertion of my will. The very respiration of heaven was at the time plainly perceived by me. It is internal, and for this reason is imperceptible to man; but by a wonderful correspondence it inflows into man's respiration, which is external, or of the body; and if man were deprived of this influx, he would instantly fall down dead. [3] The third operation that I perceived was into the systole and diastole of the heart, which had then more of softness with me than I had ever experienced at any other time. The intervals of the pulse were regular, being about three within each period of respiration; yet such as to terminate in and thus direct the things belonging to the lungs. How at the close of each respiration the alternations of the heart insinuated themselves into those of the lungs, I was in some measure enabled to observe. The alternations of the pulse were so observable that I was able to count them; they were distinct and soft. [4] The fourth general operation was into the kidneys, which also it was given me to perceive, but obscurely. From these things it was made manifest that heaven or the Grand Man has cardiac pulses, and that it has respirations; and that the cardiac pulses of heaven or the Grand Man have a correspondence with the heart and with its systolic and diastolic motions; and that the respirations of heaven or the Grand Man have a correspondence with the lungs and their respirations; but that they are both unobservable to man, being imperceptible, because internal.