31. The inner structure of groups of ideas becomes discernible in a measure when thoughts are bodied forth in speech. Its most general aspect is disclosed in the construction of a period. Conjunctions particularly are important in that they, without denoting a content of their own, serve as hints to the listener. They point out to him the connection, the antitheses, the positiveness, or the uncertainty of the speaker’s utterances; for the meanings of conjunctions can be traced back to the series-form, to negation and certitude. It should be noted that want and refusal are related to negation; expectation, together with hope and fear, to uncertainty, so that the consideration of thought masses must also include emotional states. Children possess the structure of thought just as they experience the emotional states, long before they know how to embody the same in words with the help of conjunctions. Certain conjunctions, such as, to be sure, although, on the contrary, either--or, neither--nor, etc., are not adopted by children until late. 32. Of equal importance with the inner organization of the pupil’s ideas are, for the teacher, the degree of ease or difficulty with which a given mass of ideas is called into consciousness, and its relatively long or brief persistence in consciousness. Here we are face to face with the conditions of efficient instruction and training. The most necessary statements relative to this subject will be made under the head of interest and character-building. 33. The capacity for education, therefore, is determined not by the relationship in which various originally distinct mental faculties stand to one another, but by the relations of ideas already acquired to one another, and to the physical organism. Every pupil must be studied with reference to both. =Note.=--In the minds of those whose early training has been in the hands of several persons, whose early life has, perhaps, even been spent in different households or has been tossed about by changes of fortune, there are usually formed thought masses that are heterogeneous and poorly correlated. Nor is it easy to win the single-hearted devotion of such boys. They cherish secret wishes, they feel contrasts, the nature of which it is difficult to get at, and soon strike out in directions which education can frequently not encourage. Far more susceptible of educative influences are pupils that have been, for a long time, under the guidance of only one person,--of the mother especially,--who has had their full confidence. It now remains to base their further training on what already exists and to refrain from demanding sudden leaps.