Fundamental to Prophecy, nubuwwah, and indispensable to divine religions is Revelation, a mysterious and exclusive link between God, the Most Exalted, and selectmen, the Prophets. God, the most Exalted, talks to the Prophet, directly or through the angel of Revelation, suggesting to his illuminated heart His sciences, knowledge, injunctions and rules, and assigns him the mission of conveying the same to people. Without seeking help from his senses or without resorting to his mental power and drawing an analogy, the Prophet, likewise, receives the realities from the invisible world through this heavenly connection. He is, at the same time, fully conscious of the source of this invisible message; that is, God the Glorified, and of his heavy responsibility – delivering the message – and enjoys internal tranquility.