We find, in studying history, one fact held in common by all the great teachers of religion the world ever had. They all claim to have got their truths from beyond, only many of them did not know where they got them from. For instance, one would say that an angel came down in the form of a human being, with wings, and said to him, "Hear, O man, this is the message." Another says that a Deva, a bright being, appeared to him. A third says he dreamed that his ancestor came and told him certain things. He did not know anything beyond that. But this is common that all claim that this knowledge has come to them from beyond, not through their reasoning power. What does the science of Yoga teach? It teaches that they were right in claiming that all this knowledge came to them from beyond reasoning, but that it came from within themselves.