But this is not all, for science has also taught us a great deal about man himself, and his long development; which has a most important bearing on the argument. For we now know that our earth has existed for thousands of centuries, gradually evolving higher and higher forms of life, all leading up to _man_, who is the heir of all the ages, the inheritor of all that is useful and best in his long line of ancestors. And (what is very important) organic evolution seems obliged to stop here. Man is not merely a link in a series leading on to still more perfect beings, but he is the _end_ of the series. In all probability there will never be a higher being on the earth, for the causes which have produced his evolution thus far, can carry it no further. When, for instance, man acquired an erect position, there was an end to any further improvement in that respect. When he took to wearing clothes, there was an end to the body becoming hardier and stronger through exposure. When he took to using weapons and inventing machinery, mere physical strength was no longer essential, and could no longer be increased. In short, when Evolution began to take a _mental_ turn, there was an end to bodily development. Henceforth there was to be no evolution of any higher being, but rather the gradual perfecting of this one being, by mental and moral, and not physical improvements. Man is thus not only the highest being that ever has been evolved, but, as far as we can judge, the highest being that ever will be evolved on this earth. So the vast scheme of evolution, inconceivable alike in magnitude, in duration, and in complexity, is all seen to be one plan, with _man_ apparently at the end of it. And consequently, as everything was designed by God, he must have been the foreknown and intended end, from the very beginning; the first thought in creation, as well as the last. And when we thus regard man as the goal towards which nature has all along tended, and therefore as the _chief_ object which God--the Author of Nature--had in view all the time, it seems to increase his importance tenfold; and shows conclusively that in God's sight he must be anything but insignificant.