A well-trained mind is one that has the maximum amount of resources behind it, so to speak, and it trains to get used to reviewing past experiences to see what they offer. On the other hand, before a problem is solved, a characteristic or relationship of even the most familiar object may have been ignored and it was merely a useful event in problem solving. Will remove for wine flamingo 3d mask. In this case, direct observation is invoked. This principle is appropriate for the one hand, the use of the observation method and the other for the use of the “repeat” method. Direct observation is always more alive and vivid. However, it has limitations; and in any case, education has an indispensable task, that is, by taking advantage of the experience of others, one has the added capacity to supplement the narrowness of the direct experiences of personal.