In the time of sleep this body is as though dead; it does not see nor hear, it does not feel, it has no consciousness, no perception: that is to say, the powers of man have become inactive, but the spirit lives and subsists. Nay, its penetration is increased, its flight is higher, and its intelligence is greater. To consider that after the death of the body the spirit perishes, is like imagining that a bird in a cage will be destroyed if the cage is broken, though the bird has nothing to fear from the destruction of the cage. Our body is like the cage, and the spirit is like the bird. We see that without the cage this bird flies in the world of sleep; therefore if the cage becomes broken, the bird will continue and exist: its feelings will be even more powerful, its perceptions greater, and its happiness increased. In truth, from hell it reaches a paradise of delights, because for the thankful birds there is no paradise greater than freedom from the cage. That is why with utmost joy and happiness the martyrs hasten to the plain of sacrifice. In wakefulness the eye of man sees at the utmost as far as one hour of distance, because through the instrumentality of the body the power of the spirit is thus determined; but with the inner sight and the mental eye it sees America, and it can perceive that which is there, and discover the conditions of things and organize affairs. If, then, the spirit were the same as the body, it would be necessary that the power of the inner sight should also be in the same proportion. Therefore it is evident that this spirit is different from the body, and that the bird is different from the cage, and that the power and penetration of the spirit is stronger without the intermediary of the body. Now, if the instrument is abandoned, the possessor of the instrument continues to act. For example, if the pen is abandoned or broken, the writer remains living and present; if a house is ruined, the owner is alive and existing. This is one of the logical evidences for the immortality of the soul. There is another: this body becomes weak, or heavy, or sick, or it finds health; it becomes tired or rested; sometimes the hand or leg is amputated, or its physical power is crippled; it becomes blind or deaf or dumb; its limbs may become paralyzed; briefly, the body may have all the imperfections. Nevertheless, the spirit in its original state, in its own spiritual perception, will be eternal and perpetual; it neither finds any imperfection nor will it become crippled. But when the body is wholly subjected to disease and misfortune, it is deprived of the bounty of the spirit; like a mirror which, when it becomes broken, or dirty, or dusty, cannot reflect the rays of the sun, nor any longer show its bounties.