"One night, after falling asleep over a trifling novel, Dr. Otto Loewi awoke possessed by a brilliant idea. He reached to the table beside his bed, picked up a piece of paper and a pencil, and jotted down a few notes. He was professor of pharmacology at the University of Graz and was working on demonstrating that chemical agents liberated at the end of nerves are the mediators of nerve activity to control the organs that they supply. On awakening next morning he was aware of having had an inspiration in the night and he turned to the paper for a reminder. To his utter despair he could not make anything of the scrawl he found on it. He went to his laboratory, hoping that sense would come to what he had written if he were surrounded by familiar apparatus. In spite of frequently withdrawing the paper from his pocket and studying it earnestly, he gained no insight. At the end of the day, still filled with the belief that he had had a very precious revelation the night before, he went to sleep. To his great joy he again awoke in the darkness with the same flash of insight which had inspired him the night before. This time he carefully recorded it before going to sleep again. The next day he went to his laboratory and in one of the neatest, simplest and most definite experiments in the history of biology brought proof of the chemical mediation of nerve impulses. He prepared two frog hearts which were kept beating by means of a salt solution. He stimulated the vagus nerve of one of the hearts, thus causing it to stop beating. He then removed the salt solution from this heart and applied it to the other one. To his great satisfaction the solution had the same effect on the second heart as vagus stimulation had had on the first one: the pulsating muscle was brought to a standstill. This was the beginning of a host of investigations in many countries throughout the world on chemical intermediation, not only between nerves and the muscles and the glands they affect but also between nervous elements themselves.[13]

In the cases described above, it may well be argued that all the necessary pieces of information needed for the resolution of the problem were already in the conscious mind, the subconscious only proving to be a more powerful tool for synthesizing such information in some mysterious manner. It is possible to attribute Dr. Otto Loewi’s dreams to the subconscious mind for it can be argued that subconscious had all the ingredients that went into the dream. But what about dream or revelation content that is totally foreign to that person. Sometimes the revelation can be in a language foreign to the recipient."

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https://www.alislam.org/articles/al-aleem-bestower-of-true-dreams/