It seems as if Séguin felt that a good method must start from a superior point, geometry; the intelligence of the child is only considered worthy of attention in its relation to abstract things. And is not this a common defect?
Let us observe mediocre men; they pompously assume erudition and disdain simple things. Let us study the clear thought of those whom we consider men of genius. Newton is seated tranquilly in the open air; an apple falls from the tree, he observes it and asks, "Why?" Phenomena are never insignificant; the fruit which falls and universal gravitation may rest side by side in the mind of a genius.
If Newton had been a teacher of children he would have led the child to look upon the worlds on a starry night, but an erudite person might have felt it necessary first to prepare the child to understand the sublime calculus which is the key to astronomy—Galileo Galilei observed the oscillation of a lamp swung on high, and discovered the laws of the pendulum.
In the intellectual life simplicity consists in divesting one's mind of every preconception, and this leads to the discovery of new things, as, in the moral life, humility and material poverty guide us toward high spiritual conquests.
If we study the history of discoveries, we will find that they have come from real objective observation and from logical thought. These are simple things, but rarely found in one man.
Does it not seem strange, for instance, that after the discovery by Laveran of the malarial parasite which invades the red blood-corpuscles, we did not, in spite of the fact that we know the blood system to be a system of closed vessels, even so much as suspect the possibility that a stinging insect might inoculate us with the parasite? Instead, the theory that the evil emanated from low ground, that it was carried by the African winds, or that it was due to dampness, was given credence. Yet these were vague ideas, while the parasite was a definite biological specimen.
When the discovery of the malarial mosquito came to complete logically the discovery of Laveran, this seemed marvellous, stupefying. Yet we know in biology that the reproduction of molecular vegetable bodies is by scission with alternate sporation, and that of molecular animals is by scission with alternate conjunction. That is, after a certain period in which the primitive cell has divided and sub-divided into fresh cells, equal among themselves, there comes the formation of two diverse cells, one male and one female, which must unite to form a single cell capable of recommencing the cycle of reproduction by division. All this being known at the time of Laveran, and the malarial parasite being known to be a protozoon, it would have seemed logical to consider its segmentation in the stroma of the red corpuscle as the phase of scission and to await until the parasite gave place to the sexual forms, which must necessarily come in the phase succeeding scission. Instead, the division was looked upon as spore-formation, and neither Laveran, nor the numerous scientists who followed the research, knew how to give an explanation of the appearance of the sexual forms. Laveran expressed an idea, which was immediately received, that these two forms were degenerate forms of the malarial parasite, and therefore incapable of producing the changes determining the disease. Indeed, the malaria was apparently cured at the appearance of the two sexual forms of the parasite, the conjunction of the two cells being impossible in the human blood. The theory—then recent—of Morel upon human degeneration accompanied by deformity and weakness, inspired Laveran in his interpretation, and everybody found the idea of the illustrious pathologist a fortunate one, because it was inspired by the great concepts of the Morellian theory.
Had anyone, instead, limited himself to reasoning thus: the original form of the malarial insect is a protozoon; it reproduces itself by scission, under our eyes; when the scission is finished, we see two diverse cells, one a half-moon, the other threadlike. These are the feminine and masculine cells which must, by conjunction, alternate the scission,—such a reasoner would have opened the way to the discovery. But so simple a process of reasoning did not come. We might almost ask ourselves how great would be the world's progress if a special form of education prepared men for pure observation and logical thought.
A great deal of time and intellectual force are lost in the world, because the false seems great and the truth so small and insignificant.
I say all this to defend the necessity, which I feel we face, of preparing the coming generations by means of more rational methods. It is from these generations that the world awaits its progress. We have already learned to make use of our surroundings, but I believe that we have arrived at a time when the necessity presents itself for utilising human force, through a scientific education.