And, in any case, they are all that science gives you! So realise, lastly, _the limitations of science; do not expect from it more than it can give_. Over and over you hear it said ‘Science has failed to satisfy us about this’ and ‘Science has shown itself unable to deal with that’; but ask yourself—if you deem the statements true—what are the ‘this’ and the ‘that,’ and whether science ever gave any pledge that she would handle them. Scientific discoveries have had far-reaching consequences for practice, and have changed our whole mode of living; but the fact remains that “the most useful parts of science have been investigated for the sake of truth, and not for their usefulness.” Scientific progress is reflected in the systems of logic and ethics and æsthetics, even in metaphysics itself; but theoretical values lie, as practical values also lie, beyond the purview of the scientific enquirer. Science is bound down from the outset to a certain method, the method of observation; to a certain point of view, the existential as opposed to the significant; to a certain task, the task of description and correlation. Beyond these limits, science has no pretensions; within them, she has accomplished much, and is earnest to accomplish more. Questions and Exercises (1) Keep a pad by you for a week, and note down the occasions when your experience is wholly selfless and markedly selfful. Describe, as well as you can, the various self-experiences. (2) Mention some of the superstitions that connect the name with the personality (p. 313). Is there any echo of these superstitions in our own civilised experience? (3) On p. 319 a hint is given of the way in which vision, kinæsthesis and organic sensation, and verbal ideas might come to be preferred, as vehicles of the meaning of self. Can you make any further suggestion as regards kinæsthesis and organic sensation? (4) A well-known medical writer remarks: “Self is stomach. The function of assimilating food is the most fundamental of all the functions; it is antecedent even to locomotion and propagation. Hence anything which directly affects the organism as a whole affects the stomach.” What self is here referred to? (5) Professor Mach tells the following story. “I got into an omnibus one morning, after a tiring night on the train, just as some one else was entering from the far end. ‘Some broken-down schoolmaster,’ I thought. It was myself; there was a large mirror opposite the omnibus door” (see Analysis of Sensations, 1910, 4). What psychological laws does the story illustrate? (6) What is meant by the ‘unity of consciousness’?