What is the definition of discipline according to Montessori?

Montessori created a defined environment where children could learn and explore.They were encouraged to do what they needed to do in their particular stage of development. The classroom provided a sense of outward dscipline that over time transferred into an inward type of discipline. Montessori classrooms do have rules that are based on safety and manners. However, they are settings designed for just chlidren and promote freedom of learning and movement that fosters the inner discipline of the child.
Montessori said it quite simply that “Discipline must come through liberty.”