Three Kinds of Reading.
Your reading will thus consist of three kinds: reading for knowledge, by which I mean the storing of your memory with facts; reading for thoughts, by which I mean the ideas and reflections that set your own mind thinking; and reading the words, by which I mean the best language in which the best authors have clothed their thoughts. And these three classes of reading should be pursued together daily, more or less as you can, for they are needful each to the others, and neither can be neglected without injury to the rest.
So also you must make it a business to think. You will probably say that you are always thinking when you are not doing anything, and often when you are busiest. True, the mind is active, but wandering, vaguely from topic to topic. You are not in reality thinking out anything; indeed, you cannot be sure that your thoughts have a shape until you try to express them in words. Nevertheless you must think before you can write or speak, and you should cultivate a habit of thinking at all appropriate seasons.
But do not misunderstand this suggestion. I do not design advising you to set yourself a-thinking, as you would take up a book to read at the intervals of business, or as a part of a course of self-training; for such attempts would probably begin with wandering fancies and end in a comfortable nap. It is a fact worth noting, that few persons can think continuously while the body is at perfect rest. The time for thinking is when you are kept awake by some slight and almost mechanical muscular exercise, and the mind is not busily attracted by external subjects of attention.
Thus walking, angling, gardening, and other rural pursuits are pre-eminently the seasons for thought, and you should cultivate a habit of thinking during those exercises, so needful for health of body and for fruitfulness of mind. Then it is that you should submit whatever subject you desire to treat to careful review, turning it on all sides, and inside out, marshalling the facts connected with it, trying what may be said for or against every view of it, recalling what you may have read about it, and finally thinking what you could say upon it that had not been said before, or how you could put old views of it into new shapes.
Learning to Think.
Perhaps the best way to accomplish this will be to imagine yourself writing upon it, or making a speech upon it, and to think what in such case you would say; I do not mean in what words you would express yourself, but what you would discourse about; what ideas you would put forth; to what thoughts you would give utterance.
At the beginning of this exercise you will find your reflections extremely vague and disconnected; you will range from theme to theme, and mere flights of fancy will be substituted for steady, continuous thought. But persevere day by day, and that which was in the beginning an effort will soon grow into a habit, and you will pass few moments of your working life in which, when not occupied from without, your mind will not be usefully employed within itself.
Having attained this habit of thinking, let it be a rule with you, before you write or speak on any subject, to employ your thoughts upon it in the manner I have described. Go a-fishing. Take a walk. Weed your garden. Sweep, dust, do any sewing that needs to be done. While so occupied, think. It will be hard if your own intelligence cannot suggest to you how the subject should be treated, in what order of argument, with what illustrations, and with what new aspects of it, the original product of your own genius.
At all events this is certain, that without preliminary reflection you cannot hope to deal with any subject to your own satisfaction, or to the profit or pleasure of others. If you neglect these precautions, you can never be more than a wind-bag, uttering words that, however grandly they may roll, convey no thoughts. There is hope for ignorance; there is none for emptiness.