Goals of the first, second, third plane of development

On page 5 of Montessori Today, it says that "Montessori discovered that 3 things happen in each plane of development."  One being, each has a specific goal in development. What do we feel is /are the goals in each plane?

CHAPTER 1

Montessori believed that the goal of education should be our focus rather then the methods we use.  What do you feel the goal of education is/should be?