Thus, we find that neither astronomy nor physical science offers us any satisfactory explanation of the constant maintenance of solar radiation. Common sense tells us that this furnace, constantly in activity, must be as unceasingly fed; but science is as yet unable to discover the nature and source of its aliment.
There, where science places nothing, we venture to place something. In our belief solar radiation is maintained by the continuous, unbroken succession of souls, in the sun. These pure and burning spirits are perpetually replacing the emanations perpetually sent through space by the sun, to the globes which surround him. Thus we complete that uninterrupted circle of which we have previously spoken, which binds together all the creatures of nature by the links of a common chain, and attaches the visible to the invisible world. We may venture to put forward this explanation of the maintenance of solar radiation with some confidence, since science can give us no exact information upon the point, and philosophy in this case only fills up the void left by astronomy and physics.
In short, the sun, the centre of the planetary aggregation, the constant source of light and heat, which sends forth motion, sensation, and life upon the earth, is, in our belief, the final sojourn of purified perfected souls, which have attained their most exquisite subtlety. They are entirely devoid of material alloy, they are pure spirits who dwell in the midst of the blazing atmosphere and the burning masses which compose the sun. That star, whose size far surpasses the bulk of all the others put together, is sufficiently vast to contain them. From their throne of fire, these souls, all intelligence and activity, behold the marvellous spectacle of the march of all the planetary globes which compose the solar world, through space. Placed in the centre of this vast world, understanding the secrets of nature, and all the mysteries of the universe, they are in possession of perfect happiness, of absolute wisdom, and of illimitable knowledge.
The Genoese naturalist, Charles Bonnet, was the first to bring forward general ideas upon the philosophy of the universe, in the same order as those which we have just developed. In his _Palingénésie Philosophique_, published in 1771, he introduces the doctrine of divers existences for the human soul, outside that of the earth. In a chapter appended to that work, and entitled, "Conjectures on the blessings to come," he draws a picture of the perfect happiness which we shall enjoy in that abode, and dwells, in the following eloquent words, on the transcendent knowledge which we shall possess, which will unfold to our view all the secrets of the physical and moral worlds:--