The careful student, after reading these words of Thurlow Weed, will see that in them he has not only given a method of recalling the particular class of occurrences mentioned in this lesson, but has also pointed out a way whereby the entire field of memory may be trained and developed. The habit of reviewing and "telling" the things that one perceives, does and thinks during the day, naturally sharpens the powers of future observation, attention and perception. If you are witnessing a thing which you know that you will be called upon to describe to another person, you will instinctively apply your attention to it. The knowledge that you will be called upon for a description of a thing will give the zest of interest or necessity to it, which may be lacking otherwise. If you will "sense" things with the knowledge that you will be called upon to tell of them later on, you will give the interest and attention that go to make sharp, clear and deep impressions on the memory. In this case the seeing and hearing has "a meaning" to you, and a purpose. In addition to this, the work of review establishes a desirable habit of mind. If you don't care to relate the occurrences to another person—learn to tell them to yourself in the evening. Play the part yourself. There is a valuable secret of memory imbedded in this chapter—if you are wise enough to apply it.