The first great division we studied was concerned with the levels into which the mind was divided and the types of thinking which were carried on in each of them. The problems of memory and concentration are closely concerned with these levels and the interrelations between them. If an idea, after entering the mind, disappears into the subconscious, we say it is forgotten and regard it as lost. This, we have seen, is not the case, however. It is stored in the subconscious, and we can make use of it even if we cannot gain direct access to it. There is an old story concerning the advice that was given to a judge newly raised to the bench, “Give your decision, it is probably right; but do not give your reasons, they are very likely to be wrong.” Which is merely a pithy way of saying: “Let your subconscious work out your decision in the light of the enormous masses of data it possesses, including the exact reproduction of every law-book you have ever read, every remark, however casual, you have ever heard, together with the accumulated experience of your race, all of which you are heir to, and it will probably be right; but if you try to rationalise this decision, to explain it in terms of your conscious knowledge, you may make mistakes, because your conscious mind does not know nearly as much as your subconscious.” If we would learn to trust our subconscious methods of thinking, we should be astonished to find what they are capable of. Genius might be defined as the power of utilising the subconscious mind, and inspiration as a subliminal uprush. Memory also can be greatly improved by taking advantage of the faculty of association of ideas, a faculty upon which the different memory systems are founded. If we take any idea we wish to remember and clearly image it in association with some idea of the same class that is so familiar to us that it is a permanent part of our mental furniture, then the two concepts will get stuck together, and we can always use the second to summon the first. The instincts and their development and method of functioning form a second great division of our subject. It will be seen that we must view our life in relation to the instincts and not to the reason, but it must not be forgotten that the instincts themselves are evolving or rather perhaps becoming modified in their expressions by the pressure of new conditions, and in the course of their evolution are being steadily socialised and civilised, so although we must realise that, in their primitive form, they lie at the base of our being, yet in their evolved form they also function at its apex, and that if we are to live well, we must harmonise their manifestation upon every level of our being.