Dr. Montessori's words from the 1946 London Lectures describe principles of intelligence and character, the work of the hand, and movement with a purpose as being integral to self-construction. The perfection of movement is spiritual, says Dr. Montessori. Repetition of practical life exercises are exercises in movement with the dignity of human cooperation and a sense of equality. Her emphasis on exactness and "harmony" between the psychic and motor parts speaks to the importance of practical life. [Reprinted from "The 1946 London Lectures," pages 158-164, copyright ©2012 by Montessori-Pierson Publishing Company.]