All ego functions, like perception, thinking, language, the comprehension of objects, and the coordination of movements and learning processes in general, require a long period of indirect preparation before they emerge as integrated aspects of the personality.

Mario Montessori Jr, Education for Human Development

One of the most important practical aspects of our method has been to make the training of the muscles enter into the very life of the children so that it is intimately connected with their daily activities. Education in movement is thus fully incorporated into the education of the child's personality.

Maria Montessori, The Discovery of the Child

The embryonic development of each of its parts must in the end become integrated when the hand is at work and the mind is guiding it. If outer conditions prevent this integration from occurring the result is an unequal development.

Maria Montessori, The Absorbent Mind

There should be ample opportunity in the environment for the child to practice, work through, and integrate with previous skills, any new function or skill that has been acquired.

Mario Montessori Jr, Education for Human Development

Knowledge of the child should become the basis of a new form of education which serves to help human beings to reach a high level of emotional, intellectual and moral integration.

Silvana Montanaro, Understanding the Human Being