and what ones are due to experience through contact with the world and various types of men. The logical result would be a criterion showing to what extent the intellectual life should be allowed to take the lead without unduly interfering with the spontaneities, how far custom may be followed without sacrificing independence, originality, and freedom. For efficiency is a balance between native and acquired characteristics. It is nothing if not acquired, and yet the training by which it is gained should never be permitted to extend so far that the joys of life shall be overcome.

Since efficiency has a physical and nervous basis, many of us first become aware of its opportunities through the control we possess over the body through skill in physical exercise. We also realise its benefits through that state of bodily well-being which leaves us free to work, yet insures rest, the wise use of nervous force and adaptation to the conditions which nature imposes. ¹ But bodily control implies a parallel development on the mental side. Hence the freedom from nervousness, the control at the centre which is in large part the secret of bodily efficiency, finds its counterpart in poise, absence of fear, freedom from anxiety and all other mental states that tend to

¹ Among many recent treatises that bear on these matters one of the best is The Efficient Life, by Dr. L. H. Gulick; New York, Doubleday, Page & Co., 1909.