Mr. H. G. Wells once suggested that there should be three professors for every subject: one for research, one to write the textbooks, and one to lecture. There is a good deal of truth in the contention that the best philosopher is seldom the best teacher of philosophy. Although most teachers of philosophy are well aware of the fact that they are not great philosophers, and they are genuinely interested in the teaching of their subject, nevertheless there is a tendency for too much emphasis to rest upon their own researches. In consequence, too little attention has been paid to the technique of teaching philosophy.