Let us once more suppose a child in the act of reading the history of Cain and Abel, in the manner in which it is commonly read by the young, and that the child thoroughly understands all the circumstances. He may be deeply interested in the story, while the uses to be made of it may not be very clearly perceived. But if, after reading any one of the moral circumstances, such as "Cain hated his brother," or after having it announced to him by the teacher, he was asked, "What does that teach you?" the practical use of the truth would at once be forced upon his mind, and he would now very readily answer, "It teaches me that I should not hate my brother." In this case also, it is quite obvious, that without such a question having been proposed, and the answer to it given, the practical uses of the truth recorded might have been altogether overlooked; and even although they had not, still the question and its answer will always have the effect of making them stand out much more prominently before the mind, and will enable the memory to hold them more tenaciously, and bring them forth more readily for practice, than if such an operation had been neglected. Hence the great importance of training the young by this exercise early to perceive the uses of every kind of knowledge, particularly Scriptural knowledge; because the habit formed in youth, will continue to render every useful truth of practical benefit during life. We may remark here, that the exercise is not limited in its application to the young. For if an adult were first told, that the squalid beggar before him, though once respectable and rich, had made himself wretched by a course of idleness and dissipation, and were then asked, "What does that teach you?" he would instantly perceive the lesson, and would be stimulated to apply it. When, in like manner, the farmer is told that his neighbour has ruined himself by over-cropping his ground; or the iron master, that the use of the hot-blast has doubled the profits of his rival; a similar question would at once lead to the legitimate conclusion, and most likely to the proper conduct.