Humanity has striven after truth for ages; and yet there is no period in the history of the world in which some of mankind have not realized the truth. The only difference is that one says, "I have discovered something", and the other says, "There is nothing new under the sun." The mystic's view is, "What I have known today has been known before, and will be known afterwards." It has never been known by all, and will never be known by all; but as the sight becomes keen, so man will be able to see.