Free choice is one of the highest of all the mental processes.

An interesting piece of work, freely chosen, which has the virtue of inducing concentration rather than fatigue, adds to the child's energies and mental capacities, and leads him to self-mastery.

To teach details is to bring confusion; to establish the relationship between things is to bring knowledge.

The most important period of life is not the age of university studies, but the first one, the period from birth to the age of six.

The principal agent is the object itself and not the instruction given by the teacher. It is the child who uses the objects; it is the child who is active, and not the teacher.

The teacher must derive not only the capacity, but the desire, to observe natural phenomena. The teacher must understand and feel her position of observer: the activity must lie in the phenomenon.

A child is mysterious and powerful; And contains within himself the secret of human nature.