Once the child can speak, he can express himself and no longer depends on others to guess his needs. He finds himself in touch with human society, for people can only communicate by means of language.... Very soon afterward, at one year of age, the child begins to walk.... So man develops by stages, and the freedom he enjoys comes from these steps towards independence taken in turn... Truly it is nature which affords the child the opportunity to grow; it is nature which bestows independence upon him and guides him to success in achieving his freedom.