Again, of the Christian revelation he says: "The sender of the alleged message is not a sheer invention: there are grounds independent of the message itself for belief in His reality.... It is moreover much to the purpose to take notice that the very imperfection of the evidences which natural theology can produce of the divine attributes removes some of the chief stumbling-blocks to the belief of revelation." Here is the _raison d'être_ of revelation. This revelation, it should be borne in mind, in its method and character bears a striking similarity to the natural world, from whose Author it professes to come, as was long ago pointed out by Bishop Butler, and recently with great cogency by Mr. Henry Rogers in his most forcible work on the _Superhuman Origin of the Bible_. Again: "A revelation cannot be proved unless by external evidence--that is, by the evidence of supernatural facts." Here is an assertion of the necessity of miracles. Again: "Science contains nothing repugnant to the supposition that every event which takes place results from a specific volition of the presiding Power, provided this Power adheres in its particular volitions to general laws laid down by itself;" which is the biblical representation of the divine mode of action. Again: "All the probabilities in case of a future life are that such as we have been made, or have made ourselves before the change, such we shall enter into the life hereafter;" which is the exact declaration of Scripture. Mr. Mill further helps the Christian cause by pointing out two flaws in Hume's argument against miracles--viz., that the evidence of experience to which its appeal is made is only negative evidence; which is not conclusive, since facts of which there had been no previous experience are often discovered and proved by positive experience to be true; and secondly, the argument assumes that the testimony of experience against miracles is undeviating and indubitable, whereas the very thing asserted on the other side is that there have been miracles, and that the testimony is not wholly on the negative side.