That which already is will not arrive. And so to see that which is and cannot be seen, one has to believe; and believe is understanding. Believe, understand and see and thus become. But to truly believe one needs knowledge because knowledge gives form and reform and things are seen through there form. When one, for example, studies a certain tree or now knows the name of a certain tree thus one begins to see that certain tree in places where one once looked before but the certain tree was not seen.