Much attention is paid to finding out the best methods of teaching children to read. We invent printing-offices and charts; we turn a child's room into a printer's establishment.[15] Locke proposes teaching children to read by means of dice; a brilliant contrivance indeed, but a mistake as well. A better thing than all these, a thing no one thinks of, is the desire to learn. Give a child this desire, and you will not need dice or reading lotteries; any device will serve as well. If, on the plan I have begun to lay down, you follow rules exactly contrary to those most in fashion, you will not attract and bewilder your pupil's attention by distant places, climates, and ages of the world, going to the ends of the earth and into the very heavens themselves, but will make a point of keeping it fixed upon himself and what immediately concerns him; and by this plan you will find him capable of perception, memory, and even reasoning; this is the order of nature.[16] In proportion as a creature endowed with sensation becomes active, it acquires discernment suited to its powers, and the surplus of strength needed to preserve it is absolutely necessary in developing that speculative faculty which uses the same surplus for other ends. If, then, you mean to cultivate your pupil's understanding, cultivate the strength it is intended to govern. Give him constant physical exercise; make his body sound and robust, that you may make him wise and reasonable. Let him be at work doing something; let him run, shout, be always in motion; let him be a man in vigor, and he will the sooner become one in reason. You would indeed make a mere animal of him by this method if you are continually directing him, and saying, "Go; come; stay; do this; stop doing that." If your head is always to guide his arm, his own head will be of no use to him. But recollect our agreement; if you are a mere pedant, there is no use in your reading what I write. To imagine that physical exercise injures mental operations is a wretched mistake; the two should move in unison, and one ought to regulate the other.