To this third class I myself belong. I would not be unjust to the past or to the future. I would be loyal to truth, and not shut my eyes to what God reveals which is new; and I would not be unfaithful to what has already been taught me, or ungrateful for the love which has taught the world by the mouths of past prophets and apostles. § 2. The Difficulty. Antiquity of the World, and Age of Mankind. Let us then see, first, what the problem before us is; and this can perhaps be best understood by means of an example. The common opinion among Christians is, that the world was made four thousand and four years before Christ, and that all mankind are descended from Adam and Eve. These opinions are derived from the book of Genesis, which tells us that after God had made the world and other things in five days, on the sixth day he made man in his own image; and that, when the first man, Adam, was a hundred and thirty years old, he had a son, named Seth; and from Seth, according to Genesis, are descended, by a genealogy given in the fifth chapter of Genesis, Noah and his sons; and the ages being given from Adam down to Abraham, and from Abraham to Christ, the age of the world and the age of the human race have been computed. As long as there was no reason for supposing any different period for the antiquity of the world, these numbers were quietly accepted. But various new facts have been noticed, and new sciences have arisen, within the past fifty years, which have thrown doubt upon this chronology. In the first place the great science of geology has examined the rocky leaves which envelop the surface of the earth, and has found written upon them proofs of an immense antiquity. It is found that the earth, instead of being created four thousand years ago, must have existed for myriads of years, in order to have given time for the changes which have taken place in its structure. This evidence was long doubted and resisted by theologians, as they supposed in the interest of Scripture; but the evidence was too strong to be denied, and no intelligent theologian, however Orthodox, now believes the world to have been made in six days, or to have been created only six thousand years ago. With some, the six days stand for immense periods of time; with others, the whole story is considered a vision, or a symbolical account of geological events; but no one takes it literally. This result has come from the overwhelming amount of evidence for the antiquity of the earth, derived mainly from the fossil rocks. Of these fossiliferous rocks there are over thirty distinct strata, lying superimposed, in a regular series, each filled with the remains of distinct varieties of animals or of plants. These rocks must each have been an immense period of time in being formed, for the shells which they contain, although very delicate, are unbroken, and could only be slowly deposited in the quiet depths of a great ocean. There are also evidences