Of all the domains of human consciousness, the physical is the one most completely governed by method, order, discipline, process. The lack of plasticity and receptivity in matter has to be replaced by a detailed organisation that is both precise and comprehensive. In this organisation, one must not forget the interdependence and interpenetration of all the domains of the being. However, even a mental or vital impulse, to express itself physically, must submit to an exact process. That is why all education of the body, if it is to be effective, must be rigorous and detailed, far-sighted and methodical. This will be translated into habits; the body is a being of habits. But these habits should be controlled and disciplined, while remaining flexible enough to adapt themselves to circumstances and to the needs of the growth and development of the being. All education of the body should begin at birth and continue throughout life. It is never too soon to begin nor too late to continue.
Ref: On Education