Since matters stand thus, since the development of Science is the fundamental condition of the happiness of man, we must resolutely put Science at the basis of every civilisation. Alas! it has not been so up to the present; and if we study the development of human societies, we see that they are above all things attracted to war. Science has had only the leavings. But the time has come when man should no longer believe that the principle of morality is man's struggle against man. That was the history of bye-gone times. The history of to-day, and especially the history of to-morrow, is the struggle of man against matter, the subjection of natural forces to our intelligence. And there is no other way to subjugate these forces than by learning to know them.

Then Science will be put in the foreground. And without making any classification which distinguishes between the sciences, which are all useful, beautiful, and noble, for all contain a portion of truth, we shall be permitted to say that the Science of life is one of the most useful, the most noble, and the most beautiful.

Now, the Science of life is Physiology, taking physiology in its widest sense, that is to say, the study of normal beings and of diseased beings. It is proved by innumerable facts, facts which only bad faith and ignorance can call into question, that our physiological knowledge is due, in a very large measure, to experimentation. If in thought we suppressed the scientific results which experimentation has conquered, we should have but an inferior science, within the reach of the Brahmans may be, but unworthy of our present scientific standing. We should know nothing of the circulation of the blood, nor the function of the blood corpuscles, nor the formation of sugar, nor the innervation of the glands, nor the contagiousness of disease, nor the power of poisons; we should be reduced to the notions of Hippocrates, we should be less advanced than Galileo, the first ingenious experimenter who indicated, less by his writings than by his experiments, that the basis of physiology, and consequently of the whole of pathology, is experimentation on animals.

Those most sincere persons who wish to banish experimentation from Science are consequently, I do not fear to say it, standing in the position of direct contradiction to true morality. To refuse man the right to study living nature, is as though we declared that living nature ought not to be known. Alas! anti-vivisectionists will not listen. In vain do we tell them that we, physiologists, preserve man from disease; that we have alleviated the ills of our human brothers. They stop up their ears; they shut their eyes; they have no pity for the sufferings of human beings. It seems as though the tears of their brethren were profoundly indifferent to them. Is this a high morality? Is this a realisation of their duty as men? They cover with opprobrium the names of Harvey and Jenner, Bernard and Pasteur, Spallanzani and Helmholtz. What base ingratitude! It is these great men who have turned aside many excruciating sufferings from humanity; it is these grand men who have bestowed a better lot on so many human beings. When, therefore, they dare to calumniate the masters who have scattered over us so much beneficence, anti-vivisectionists seem to me to be not only the most ungrateful but even the cruellest of men.

Fortunately the conquering march of Science will not be hindered. We shall never return to those sinister times when our great Vesalius had to forfeit his life for having dared to dissect a human corpse. We shall continue to make Science advance towards its great aim, the good of man.

And this is the moment which has been chosen for striving to arrest the march of Science: when epidemic disease, such as the plague and cholera, is checked; tuberculosis half-conquered; diptheria rendered inoffensive; operations become almost harmless; cancer on the eve of being understood and subjugated! And are we to stop there? Are we not to seek to fathom the many problems still waiting to be solved, and on which depend the lives of so many human beings, and so much human happiness? Do you believe that Science has come to an end? Certainly we already know a great deal; but what we know is as nothing compared to what we do not know.

An immense domain of unknown truths lies open to our activity. And we are able to forsee what inexpressible benefits these new truths will scatter over suffering humanity. Consequently, everyone, every man enamoured of goodness and justice, should be filled with respect for Science, and set all his hopes on her.

At the same time, however great may be my adoration for Science, it must not be at the expense of human personalities, or, let us say it distinctly, at the expense of animal personalities, which although uncertain and indistinct, still merit a share, and a large share, of justice and of pity.

As for human personalities, without the slightest doubt, we have not the right to sacrifice an innocent creature for Science. Every human being ought to be treated with respect, and we have not the right to kill and martyrise a human being even if his death and his martyrdom might serve the cause of Science.

As for animal personalities, the question becomes much more doubtful. For inferior beings with indistinct consciousness, and, without a doubt powerless to perceive pain, no scruple should hold us back. But if it concerns beings nearer to ourselves, such as monkeys, cats, dogs, horses, all certainly capable of feeling pain, we must be chary of inflicting pain, and experiment only after having totally abolished in them all sensation of pain. But under penalty of falling into fetishism, we must not fear to use the life of these beings in order to prolong the life of man. Every time we propose to make an experiment, it is as though we put this question to ourselves: is this dog worth more than a man? or than a hundred men? or than the whole of humanity to come? Thus put, the problem bears only one solution: Avoid giving pain to the animal on condition that it is not at the cost of innumerable human pains. Moreover, it is the same here as in every question we may wish to investigate: Each of the two adversaries set out from a just principle, incontestably just. But each one pushes the just principle so far that he ends by transforming it into a colossal absurdity.