But even where this consciousness has been felt, little attempt has been made to solve the problem systematically. Leisurely discourses, pretty aphorisms, and dogmatic rules have been the forms in which the question has been dealt with. Such conflicting adages as “A good book should be read over and over again”; and “The art of reading is the art of skipping,” are not very serviceable. The necessity of some sort of orderly treatment is evident. Before we consider how to read, some queer person may ask us to put the previous question, “Should we read at all?” Now the value of reading has, in times past, been seriously doubted by thinkers and non-thinkers. The philosopher Democritus put out his eyes so that, ceasing to read, he might think. We are not going to follow his example. But we can readily sympathize with him when we think of the many learned men who have read themselves into dreamy stupidity; men who know what everybody else thought, but who never have any thoughts of their own. We must admit that the arguments of these cranks are at least good medicine for the prevalent belief that the more a man reads the more he will know and the better thinker he will become. Learning to think by reading is like learning to draw by tracing. In each case we make the work of another man our basis, instead of observing directly from Nature. The practice has its value, it is true; but no man ever became a great artist by tracing, and no man will ever become a great thinker by reading. It can never become a substitute for thought. At best, as John Locke says, “Reading furnishes the mind only with materials of knowledge, it is thinking makes what we read ours.”[15] Our problem may be divided in two parts: (1) What ratio should our reading bear to independent thinking, and (2) how should we read when we do read? It may be thought that we can learn something about the first question by investigating the practice of great thinkers. But the outcome of such an investigation is likely to be disappointment. Kant, for instance, was an omnivorous reader; so were Huxley and Sir William Hamilton; and outside the circle of philosophers, men as unlike as Gibbon, Macaulay, Milton and Thomas A. Edison. On the other hand, Spencer seldom ever read, and Hobbes is famous for his remark that if he had read as much as other men he would have known as little. Auguste Comte was unique in that he read copiously until he conceived his Positive Philosophy, and then hardly at all until the end of his life. Even were it found that most great thinkers adhered to nearly the same practice, it would prove little; for how could we tell whether they were good thinkers on account of, or in spite of it?