However, the complaints of the theologians excited by Professor Tyndall's last utterances are not wholly unreasonable. Science has done nothing hitherto to give it any authority in the region of the unseen. "Beyond the boundary of experimental evidence" one man's vision is about as good as another's. It is interesting to know that Professor Tyndall there "discerns in matter the potency and promise of every quality and form of life," but only because he is a distinguished man, who gives much thought to this class of subjects and occupies a very prominent place in the public eye. As a basis for belief of any kind, his vision is of no more value than that of the Archbishop of Canterbury, who would probably in that region discern the promise and potency of every form of life in a supreme and creative intelligence. Scientific men are continually pushing back the limits of our knowledge of the material universe. They have during the last eighty years made an enormous addition to the sum of that knowledge, but they have not, since Democritus, taken away one hair's-breadth from the Mystery which lies behind. In fact, their labors have in many ways deepened this Mystery. We can appeal confidently to any candid man to say, for instance, whether Darwin's theory of the origin of life and the evolution of species does not make this globe and its inhabitants a problem vastly darker and more inscrutable than the Mosaic account of the creation. Take, again, the light thrown on the constitution of the sun by the spectroscope; it is a marvellous addition to our knowledge of our environment, but then, does it not make our ignorance as to the origin of the sun seem deeper? No scientific man pretends that any success in discovery will ever lead the human mind beyond the resolution of the number of laws which now seem to govern phenomena into a smaller number; but if we reached the limit of the possible in that direction to-morrow, we should be as far from the secret of the universe as ever. When we have all got to the blank wall which everybody admits lies at the boundary of experimental evidence, the philosopher will know no more about what lies beyond than the peasant, though the peasant will probably do then what he does now--people it with the creatures of his imagination. If a philosopher in our day likes to anticipate that period, and hazards the conjecture that matter lies beyond, he is welcome to his guess, but it ought to be understood that it is only a guess.