The. manager must never be lacking in knowledge of the special profession which is characteristic of the undertaking: the technical profession in industry, commercial in commerce, political in the State, military in the Army, religious in the Church, medical in the hospital, teaching in the school, etc. The technical function has long been given the degree of importance which is its due, and of which we must not deprive it, but the technical function by itself cannot endure the successful running of a business; it needs the help of the other essential functions and particularly of that of administration. This fact is so important from the point of view of the organization and management of a business that I do not mind how often I repeat it in order that it may be fully realized.