The catechetical exercise, as in the "First Class Book on the Lesson System," will almost always accomplish the object here pointed out; and the value of the exercise it recommends will be best understood and appreciated, by observing the evils which invariably follow its neglect. For if the child be allowed to read on and on, while the difficulty of decyphering the words in the book remains, the ideas will be left behind, the attention will be fatigued, and at last exhausted. The child will continue to read without understanding; and the habit thus acquired of reading the words, without perceiving the ideas at all, will soon be established and confirmed. Custom has robbed this relict of a former age of much of its repulsiveness; but it is not the less hurtful on that account. Were we to run a parallel with it in any other matter, its true nature and deformity would at once appear. For example, were we to suppose ourselves listening to an imperative message from a superior, by a messenger with whose language we were but partially acquainted, we would not allow him to proceed with his communication from beginning to end, while the very first sentence he uttered, had not been understood, and the mind was unprepared for that which was to follow. We would stop him at the close of the very first sentence, and would master the meaning of that, before we would advance with him another step; and then we would make him proceed at such a pace as we could keep up with him. If he left us again behind, there would be but one remedy. He must return and repeat the sentence where he left us, till we had comprehended his master's meaning; and if he refused to do this, he could not conscientiously say to him on his return, that he had delivered his message. By following this plan, and adopting this branch of the natural principle of individuation in such a case, two benefits would arise. We would first become perfectly acquainted with the will and message of our superior; and next, we would, at the close of the exercise, be so much more familiar with the language in which it was delivered, as that it would require less effort on a future occasion, to comprehend the meaning of the same speaker. If this method had not been adopted, and the message had been given entire and without a pause, it might have been rehearsed in our hearing a hundred times, but the meaning would neither have been mastered, nor would our knowledge of the language have been in the least improved.