The study of expression ought to form a part of the study of psychology, but it also comes within the province of anthropology because the habitual, life-long expressions of the face determine the wrinkles of old age, which are distinctly an anthropological characteristic.

The possibility of observing the developments of the psychical life of the child as natural phenomena and experimental reactions transforms the school itself in action into a kind of scientific laboratory for the psychogenetic study of man.

With man, the life of the body depends on the life of the spirit.

Maria Montessori Quotes