 The same applies to other forms of communication from the supernal world. In the case of the prophet, he acquires all the intelligibles comprising knowledge, complete with middle terms as already mentioned, because the intellective capacity of his rational soul to hit upon the middle terms and acquire the intelligibles is extraordinarily high; this capacity is coupled with an equally highly developed internal sense of imagination that can translate this intellective knowledge into language and images (in the form of a revealed book) that the vast majority of humans can easily understand. But in addition to intelligible knowledge, the divine effluence from the intellects and the souls of the celestial spheres also includes information about events on earth, past, present, and future—what Avicenna calls “the unseen” (al-ghayb)—, for all of which the intellects and souls of the celestial spheres are directly responsible. This information can also be received by humans in various forms—as waking or sleeping dreams, as visions, as messages to soothsayers—depending on the level of the humoral equilibrium of the recipient, the proper functioning of his internal and external senses, and the readiness of his intellect. Somebody whose internal sense of imagination or estimation is overactive, for example, may be hindered thereby in the clear reception of dream images so that his dreams would require interpretation, while someone else not so afflicted may get clearer messages; or a soothsayer who wishes to receive information about the future has to run long and hard in order to bring about such a humoral equilibrium through the exertion, thereby preparing his intellect to receive the message.