I must take a moment to point out that you do not commit the error of circular reasoning when you use the Bible to prove the Bible. The reason is very simple. You see, the Bible is not one book! It is a collection of 66 books written by more than 40 authors over a period of 1,600 years. Therefore, if you quote Jeremiah or Isaiah to substantiate Daniel, or if you quote Daniel to verify Revelation, you are not involved in circular reasoning. Instead, you are quoting altogether independent sources who happen to be bound together between the covers of the same book.