Just as it is vital for parents to live their own lives as fully as possible and to deepen their understanding to themselves to the utmost, so it is important for teachers and educators to do the same. When children go to school their teachers become, during school hours, substitutes for their parents. The children transfer to the teacher some of the feelings they have for their parents and are influenced in their turn by the personalities of the teachers. This mutual relationship is of more importance than any teaching method, and a child’s ability to learn is continually hampered if the relationship is unsatisfactory. Again, if teachers really want to be educators, to help children to develop into satisfactory men and women, and not simply to stuff them with knowledge, they will only be really successful if they themselves have sound personalities. No amount of preaching, however well done, no principles however sound, no clever technique of mechanical aids can replace the influence of a well-developed personality.