It is due to Professor Draper to say, that in this respect he only sins in common with the great body of modern physiologists. Physiology--indeed, all the inductive sciences--have been for a long time cast in a materialistic mould, and men of firm faith, and sincere and ardent piety, are materialists, and, therefore, atheists, the moment they enter the field of physical science, and deny in their science what they resolutely affirm and would die for in their faith. Hence the quarrel between the theologians and the _savans_. The _savans_ have not reconciled their so-called science with the great theological truths, whether of reason or revelation, which only the fool doubts, or in his heart denies. This proves that our physicists have made far less progress in the sciences than they are in the habit of boasting. That cannot be true in physiology which is false in theology; and a physiology that denies all reality but matter, or finds no place in it for God and the human soul, is no true physiological science. The physiologist has far less evidence of the existence of matter than I have of the existence of spirit; and it is only by spirit that the material is apprehensible, or can be shown to exist. Matter only mimics or imitates spirit. {156} The continual changes that take place from time to time in physiology show--we say it with all deference to physiologists--that it has not risen as yet to the dignity of a science. It is of no use to speak of progress, for changes which transform the whole body of a pretended science are not progress. We may not have mastered all the facts of a science; we may be discovering new facts every day; but if we have, for instance, the true physiological science, the discovery of new facts may throw new light on the science--may enable us to see clearer its reach, and understand better its application, but cannot change or modify its principles. As long as your pretended science is liable to be changed in its principles, it is a theory, an hypothesis, not a science. Physiologists have accumulated a large stock of physiological facts, to which they are daily adding new facts. We willingly admit these facts are not useless, and the time spent in collecting them is not wasted; on the contrary, we hold them to be valuable, and appreciate very highly the labor, the patient research, and the nice observation that has collected, classified, and described them; but we dare assert, notwithstanding, that the science of physiology is yet to be created; and created it will not be till physiologists have learned and are able to set forth the dialectic relations of spirit and matter, soul and body, God and nature, free-will and necessity. Till then there may be known facts, but there will be no physiological science. As far as what is called the science of human life, or human physiology, goes, Professor Draper's work is an able and commendable work; but he must permit us to say that