This question is extremely subtle: consider it attentively. This is a rational proof which we are giving, so that the wise may weigh it in the balance of reason and justice. But if the human spirit will rejoice and be attracted to the Kingdom of God, if the inner sight becomes opened, and the spiritual hearing strengthened, and the spiritual feelings predominant, he will see the immortality of the spirit as clearly as he sees the sun, and the glad tidings and signs of God will encompass him.
Yesterday we were occupied in discussing the immortality of the spirit. Know that the power and the comprehension of the human spirit are of two kinds—that is to say, they perceive and act in two different modes. One way is through instruments and organs: thus with this eye it sees; with this ear it hears; with this tongue it talks. Such is the action of the spirit, and the perception of the reality of man, by means of organs—that is to say, that the spirit is the seer, through the eyes; the spirit is the hearer, through the ear; the spirit is the speaker, through the tongue.
The other manifestation of the powers and actions of the spirit is without instruments and organs. For example, in the state of sleep without eyes it sees; without an ear it hears; without a tongue it speaks; without feet it runs. Briefly, these actions are beyond the means of instruments and organs. How often it happens that it sees a dream in the world of sleep, and its signification becomes apparent two years afterward in corresponding events. In the same way, how many times it happens that a question which one cannot solve in the world of wakefulness is solved in the world of dreams. In wakefulness the eye sees only for a short distance, but in dreams he who is in the East sees the West. Awake he sees the present; in sleep he sees the future. In wakefulness, by means of rapid transit, at the most he can travel only twenty farsakhs(156) an hour; in sleep, in the twinkling of an eye, he traverses the East and West. For the spirit travels in two different ways: without means, which is spiritual traveling; and with means, which is material traveling: as birds which fly, and those which are carried.
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.