The sphere is the geometrical figure which constitutes the physical and aesthetic bond of this work. But also the symbolic link: representing our planet, but also the cycle of life, in its finitude and its infinitude. The intervention of man is harmonious or accidental, creative or destructive. The man paces his land in an illusion of infinity, while he turns in circles without knowing it. Disasters remind him of order and he will have no choice but to adapt his rhythm to that of cosmic forces.