"The man of the future may, and even must, do things impossible in the past and acquire new motor var..." — G. Stanley Hall

The years from about eight to twelve constitute a unique period of human life.

Abundance and vigor of automatic movements are desirable, and even a considerable degree of restlessness is a good sign in young children.

Muscles are in a most intimate and peculiar sense the organs of the will.

Adolescence as the time when an individual 'recapitulates' the savage stage of the race's past.