We must strive to understand nature not only with our heart, but above all with our intellect. He who is impressionable, but not intelligent, is incapable of expressing his emotion. The world is full of men who worship the beauty of women; but how many can make beautiful portraits or beautiful busts of the woman they adore? Intelligence alone, after lengthy research, has discovered the general principles without which there can be no real art. In sculpture the first of these principles is that of construction. Construction is the first problem that faces an artist studying his model, whether that model be a human being, animal, tree, or flower. The question arises regarding the model as a whole, and regarding it in its separate parts. All form that is to be reproduced ought to be reproduced in its true dimensions, in its complete volume. And what is this volume? It is the space that an object occupies in the atmosphere. The essential basis of art is to determine that exact space; this is the alpha and omega, this is the general law. To model these volumes in depth is to model in the round, while modeling on the surface is bas-relief. In a reproduction of nature such as a work of art attempts, sculpture in the round approaches reality more closely than does bas-relief. To-day we are constantly working in bas-relief, and that is why our products are so cold and meager. Sculpture in the round alone produces the qualities of life. For instance, to make a bust does not consist in executing the different surfaces and their details one after another, successively making the forehead, the cheeks, the chin, and then the eyes, nose, and mouth. On the contrary, from the first sitting the whole mass must be conceived and constructed in its varying circumferences; that is to say, in each of its profiles. A head may appear ovoid, or like a sphere in its variations. If we slowly encircle this sphere, we shall see it in its successive profiles. As it presents itself, each profile differs from the one preceding. It is this succession of profiles that must be reproduced, and that is the means of establishing the true volume of a head. Each profile is actually the outer evidence of the interior mass; each is the perceptible surface of a deep section, like the slices of a melon, so that if one is faithful to the accuracy of these profiles, the reality of the model, instead of being a superficial reproduction, seems to emanate from within. The solidity of the whole, the accuracy of plan, and the veritable life of a work of art, proceed therefrom. The same method applies to details which must all be modeled in conformity with the whole. Deference to plan necessitates accuracy of modeling. The one is derived from the other. The first engenders the second.